使用MagicHour进行AI图像生成

• •HTTP Webhook 端点（n8n 会自动生成）
• •可能需要目标 API 的认证凭证
• •OpenAI API Key

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  "name": "使用 MagicHour 进行 AI 图像生成",
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      "name": "Webhook",
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      "webhookId": "316b0cb8-1699-400b-a68b-97311bef3c17",
      "parameters": {
        "path": "generate-image",
        "options": {
          "allowedOrigins": "*"
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        "httpMethod": "POST",
        "responseMode": "responseNode"
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      "typeVersion": 2.1
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      "name": "生成图像提示词",
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      "parameters": {
        "modelId": {
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          "mode": "list",
          "value": "gpt-4.1",
          "cachedResultName": "GPT-4.1"
        },
        "options": {
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          "temperature": 0.5
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          "values": [
            {
              "content": "=Generate a comprehensive and detailed image generation prompt from {{ $json.body.prompt }} for AI image generation model as input. Use the following information:\n\n**Subject**: AI generated\n**Image Count**: {{ $json.body.parameters.image_count }}\n**Orientation**: {{ $json.body.parameters.orientation }}\n**Style**: {{ $json.body.parameters.style.tool }}"
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            {
              "role": "system",
              "content": "=## Purpose\nYou are a prompt-generation agent. Your task is to convert structured user input into a clean, descriptive prompt suitable for text-to-image generation models (e.g., RunwayML, Stability AI, Midjourney). You do not generate images yourself. You must never invent or infer content beyond what is explicitly provided.\n\n---\n\n## Generate Subject\n- **Subject**: \n  - **ANALYZE** the user prompt carefully to create a subject. Make sure the subject is precisely inline with user expectation and their tone. \n\n## Generate Characters\n- **Character list**: \n  - Create a character list based on their roles in the user prompt\n  - Create authentic appearance, clothing when any religious prompt is provided\n\n## Output Requirements\n- Generate a **non-empty prompt** that is **≤1000 characters**, measured in UTF-16 code units.\n- The prompt must be:\n  - Grammatically correct\n  - Visually descriptive\n  - Free of filler, emotional tone, or interpretation unless explicitly provided\n  - Strictly limited to elements present in the input\n  - NO USE OF \"\". ONLY use ''\n\n---\n\n## Input Expectations\nYou will receive structured input containing:\n- **Style**: visual style (e.g., realistic, cinematic, flat vector, watercolor)\n- **Scene details**: setting, objects, characters\n- **Text overlays** (if any): exact wording and placementl\n- **Aspect ratio or dimensions** (optional)\n\nIf any required field is missing or ambiguous, you must request clarification. Do not guess or proceed with assumptions.\n\n---\n\n## Prompt Format\nProduce a single prompt string suitable for direct use in a text-to-image API. Example:\n\n> \"A realistic portrait of a Sikh man in traditional attire standing in front of the Golden Temple at sunrise, with soft lighting and warm tones. No text overlay.\"\n\n---\n\n## Constraints\n- Do **not** add characters, objects, settings, or styles not present in the input.\n- Do **not** infer emotional tone, symbolism, or narrative unless explicitly described.\n- Do **not** include fantasy, surreal, or fictional elements unless requested.\n- Do **not** include political figures, celebrities, or religious icons unless authorized.\n- Do **not** exceed 500 UTF-16 characters under any circumstance.\n- Do **not** use double quotes. Output should be JSON compatible\n\n\n---\n\n## Character Control\n- Only include characters listed in the input.\n- Do **not** invent names, faces, roles, or behaviors.\n- If a character is referenced without description, request clarification.\n\n---\n\n## Typography & Text Rules\n- Use only text explicitly provided.\n- Do **not** add slogans, captions, or labels unless specified.\n- Font style, size, color, and placement must match instructions.\n\n---\n\n## Clarification Logic\nIf the input is vague, contradictory, or incomplete:\n- **Pause prompt generation**\n- **Respond with a clarification request**\n- Do **not** guess or proceed with assumptions\n\n---\n\n## Integration Notes\n- Designed for use in automated workflows (e.g., n8n, Zapier, API pipelines)\n- Output is a single prompt string for downstream image generation\n- Compatible with models that accept natural language input and enforce character limits (e.g., RunwayML, Stability AI)\n"
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      "credentials": {
        "openAiApi": {
          "id": "PzzLblAykQPFIDZf",
          "name": "OpenAi account"
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    {
      "id": "c623f5ca-8b61-471f-958a-fe631a344af1",
      "name": "响应 Webhook",
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                "name": "filter.operator.equals",
                "type": "string",
                "operation": "equals"
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              "leftValue": "={{ $json.body.type }}",
              "rightValue": "image"
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          ]
        }
      },
      "typeVersion": 2.2
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    {
      "id": "cb6e7ecb-a20e-40b1-9c98-dd1cd788a560",
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      "typeVersion": 1.1
    },
    {
      "id": "0a9dc79f-32b5-4ca6-a4f1-beb656b3acc6",
      "name": "获取图像详情",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      ],
      "parameters": {
        "url": "=https://api.magichour.ai/v1/image-projects/{{ $('ai-image-generator').item.json.id }}",
        "options": {},
        "sendHeaders": true,
        "authentication": "genericCredentialType",
        "genericAuthType": "httpBearerAuth",
        "headerParameters": {
          "parameters": [
            {
              "name": "accept",
              "value": "application/json"
            }
          ]
        }
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      "credentials": {
        "httpBearerAuth": {
          "id": "bGXAPcjNHEGxQCF1",
          "name": "MagicHour AI"
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                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.status }}",
              "rightValue": "complete"
            },
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              "rightValue": "error"
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              "leftValue": "={{ $json.status }}",
              "rightValue": "cancelled"
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      "name": "便签",
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      "position": [
        -16,
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      ],
      "parameters": {
        "width": 416,
        "height": 576,
        "content": "## 图像可能处于以下状态之一"
      },
      "typeVersion": 1
    },
    {
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              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              },
              "leftValue": "={{ $json.id }}",
              "rightValue": ""
            },
            {
              "id": "deea2b1d-a20d-4a8f-911c-02518bcad2ad",
              "operator": {
                "type": "number",
                "operation": "gt"
              },
              "leftValue": "={{ $json.credits_charged }}",
              "rightValue": 0
            }
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      },
      "typeVersion": 2.2
    },
    {
      "id": "f4c83f1a-e23c-496c-8594-6f4d2301798d",
      "name": "下载图片",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      "parameters": {
        "url": "={{ $json.downloads[0].url }}",
        "options": {}
      },
      "typeVersion": 4.2
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    {
      "id": "dfdccb9b-0ee4-42ea-adb7-0ebc652efe9f",
      "name": "生成视频提示词",
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      "parameters": {
        "modelId": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4.1",
          "cachedResultName": "GPT-4.1"
        },
        "options": {
          "topP": 1,
          "temperature": 0.6
        },
        "messages": {
          "values": [
            {
              "content": "=Generate a comprehensive and detailed video generation prompt from {{ $json.body.prompt }} for AI image generation model as input. Use the following information:\n\n**Subject**: AI generated\n**Duration**: {{ $json.body.parameters.end_seconds }}\n**Orientation**: {{ $json.body.parameters.orientation }}\n**Resolution**: {{ $json.body.parameters.resolution }}"
            },
            {
              "role": "system",
              "content": "=## 🔹 Purpose\nYou are a prompt-generation agent. Your task is to convert minimal or structured user input into a clean, descriptive prompt suitable for text-to-video generation models (e.g., RunwayML Gen-2, Pika, Luma). You do not generate videos yourself. You must never invent characters, narrative arcs, or symbolic meaning beyond what is explicitly provided or reasonably inferred.\n\n---\n\n## 🔹 Output Requirements\n- Generate a **non-empty**, grammatically correct prompt string\n- Output must be **≤1000 UTF-16 characters**\n- Prompt must be:\n  - Visually descriptive\n  - Free of emotional tone or interpretation unless specified\n  - Strictly limited to elements provided or inferred from context\n  - Suitable for direct use in a text-to-video API\n\n---\n\n## 🔹 Input Expectations\nYou may receive minimal or structured input containing:\n- **Subject or concept** (e.g., “two world leaders playing chess”)\n- **Duration** (e.g., 5 seconds)\n- **Style** (e.g., realistic, cinematic, animated)\n- **Optional details**:\n  - Characters\n  - Setting\n  - Scene breakdown\n  - Audio/narration\n  - Text overlays\n  - End frame instructions\n\n---\n\n## 🔹 Default Handling Logic\nIf specific details are missing, apply the following default assumptions:\n\n- **Characters**: Represent as generic silhouettes or neutral figures unless described\n- **Setting**: Default to a neutral indoor space with soft lighting\n- **Scene Breakdown**: Use a single continuous shot with minimal movement\n- **Audio/Narration**: Assume silence unless ambient sound or narration is specified\n- **Text Overlays**: Assume no text unless explicitly requested\n- **Transitions**: Use hard cuts or static framing unless otherwise described\n\n---\n\n## 🔹 Output Format\nProduce a single prompt string. Example:\n\n> \"A 5-second cinematic video showing two silhouetted world leaders seated across a chessboard in a dimly lit formal room. One leader makes a move while the other watches intently. The camera remains static. No narration or text overlay.\"\n\n---\n\n## 🔹 Constraints\n- Do **not** add characters, symbols, or narrative elements not present or implied\n- Do **not** infer emotional tone, symbolism, or political meaning\n- Do **not** include fantasy, surreal, or fictional content unless requested\n- Do **not** include political figures, celebrities, or religious icons unless authorized\n\n---\n\n## 🔹 Clarification Logic\nIf the input is contradictory or dangerously vague:\n- **Pause prompt generation**\n- **Respond with a clarification request**\n- Do **not** guess or proceed with assumptions that could misrepresent intent\n\n---\n\n## 🔹 Integration Notes\n- Designed for use in automated workflows (e.g., n8n, Zapier, API pipelines)\n- Output is a single prompt string for downstream video generation\n- Compatible with models that accept natural language input and enforce character limits\n"
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        "openAiApi": {
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          "name": "OpenAi account"
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      "typeVersion": 1.8
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        "assignments": {
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              "id": "3e45a85a-be16-480c-8ce9-f9fe7ae07ba5",
              "name": "body.prompt",
              "type": "string",
              "value": "={{ $('Webhook').item.json.body.parameters.style.prompt }}"
            },
            {
              "id": "d1742fce-32ae-4d00-940b-7a6e341f90f7",
              "name": "body.parameters.name",
              "type": "string",
              "value": "={{ $('Webhook').item.json.body.parameters.name }}"
            },
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              "id": "b32892cc-7b6b-4ad7-a24f-27e93bc99364",
              "name": "body.parameters.end_seconds",
              "type": "number",
              "value": "={{ $('Webhook').item.json.body.parameters.end_seconds }}"
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              "name": "body.parameters.orientation",
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              "value": "={{ $('Webhook').item.json.body.parameters.orientation }}"
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              "name": "body.parameters.resolution",
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              "value": "={{ $json.body.parameters.style.prompt }}"
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              "type": "number",
              "value": "={{ $json.body.parameters.image_count }}"
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      "parameters": {
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        "height": 592,
        "content": "## POST 请求"
      },
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      "parameters": {
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        "content": "## GET 请求"
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    },
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      "position": [
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        "height": 416,
        "content": "## POST 请求"
      },
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    },
    {
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      "name": "条件3",
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        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
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          "combinator": "and",
          "conditions": [
            {
              "id": "69e57e0d-864d-4080-a8a8-1cf933308e79",
              "operator": {
                "name": "filter.operator.equals",
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $item(\"0\").$node[\"Webhook\"].json[\"body\"][\"type\"] }}",
              "rightValue": "image"
            }
          ]
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "69469d82-f353-4c10-a31d-fbb5414f6718",
      "name": "获取错误详情",
      "type": "n8n-nodes-base.set",
      "position": [
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        -256
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "817f5e6f-6548-49b2-834b-9a9199a63c06",
              "name": "error.message",
              "type": "string",
              "value": "={{ $json.error.message }}"
            },
            {
              "id": "80b4427b-7157-41e1-b694-dfe214cd4c1c",
              "name": "error.code",
              "type": "string",
              "value": "={{ $json.error.code }}"
            },
            {
              "id": "37299c90-153c-48d1-b21b-f4c8c97e97d3",
              "name": "error.status",
              "type": "number",
              "value": "={{ $json.error.status }}"
            },
            {
              "id": "712965ae-c018-4dbf-84c5-d031e76214ae",
              "name": "finish_reason",
              "type": "string",
              "value": "={{ $json.finish_reason }}"
            }
          ]
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      "typeVersion": 3.4
    },
    {
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      "position": [
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      ],
      "parameters": {
        "width": 384,
        "height": 352,
        "content": "## 捕获 HTTP 运行中的错误"
      },
      "typeVersion": 1
    },
    {
      "id": "205e235d-fac9-4288-983d-b1b31407f0dc",
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      "onError": "continueErrorOutput",
      "position": [
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      "parameters": {
        "url": "https://api.magichour.ai/v1/ai-image-generator",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"name\": \"{{ $('Get Data from Webhook').item.json.body.parameters.name }}\",\n  \"image_count\": {{ $('Get Data from Webhook').item.json.body.parameters.image_count }},\n  \"orientation\": \"{{ $('Get Data from Webhook').item.json.body.parameters.orientation }}\",\n  \"style\": {\n    \"prompt\": \"{{ $json.message.content }}\",\n    \"tool\": \"{{ $('Get Data from Webhook').item.json.body.parameters.style.tool }}\"\n  }\n}",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpBearerAuth",
        "headerParameters": {
          "parameters": [
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              "name": "accept",
              "value": "application/json"
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      "credentials": {
        "httpBearerAuth": {
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      "alwaysOutputData": true
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      "onError": "continueErrorOutput",
      "position": [
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      "parameters": {
        "url": "https://api.magichour.ai/v1/text-to-video",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"name\": \"{{ $('Edit Fields2').item.json.body.parameters.name }}\",\n  \"end_seconds\": {{ $('Edit Fields2').item.json.body.parameters.end_seconds }},\n  \"orientation\": \"{{ $('Edit Fields2').item.json.body.parameters.orientation }}\",\n  \"resolution\": \"{{ $('Edit Fields2').item.json.body.parameters.resolution }}\",\n  \"style\": {\n    \"prompt\": \"{{ $json.message.content }}\"\n  }\n} ",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpBearerAuth",
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              "name": "accept",
              "value": "application/json"
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      "webhookId": "3b834feb-d5dd-4637-b488-d00e66c9537d",
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      ],
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        "url": "https://api.magichour.ai/v1/video-projects/id",
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            "leftValue": "",
            "caseSensitive": true,
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              "leftValue": "={{ $json.status }}",
              "rightValue": "complete"
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                "name": "filter.operator.equals",
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              "rightValue": "error"
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      "type": "n8n-nodes-base.httpRequest",
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      ],
      "parameters": {
        "url": "={{ $json.downloads[0].url }}",
        "options": {}
      },
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    }
  ],
  "active": true,
  "pinData": {},
  "settings": {
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  },
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        [
          {
            "node": "Get Data from Webhook",
            "type": "main",
            "index": 0
          }
        ],
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            "node": "Edit Fields2",
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          }
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            "node": "Download Image",
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          }
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            "node": "Download Video",
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            "node": "Get Video Details",
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    "text-to-video": {
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    "ai-image-generator": {
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    "Generate video Prompt": {
      "main": [
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            "node": "text-to-video",
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          }
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    },
    "Get Data from Webhook": {
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          }
        ]
      ]
    }
  }
}