{
  "operation": "Run Scene-Understanding Pipeline to Extract Entities, Tone Cues, and Trend References from Canvas + Template Metadata",
  "method": "POST",
  "path": "/api/ai/captions/scene",
  "request": {
    "canvasText": [
      "string"
    ],
    "templateName": "string",
    "templateDescription": "string",
    "templateTags": [
      "string"
    ],
    "trendSignals": [
      "string"
    ]
  },
  "response": {
    "message": "Scene understanding payload"
  }
}