{
  "endpoint_type": "image2video",
  "payload": {
    "image": "/Users/moon/.openclaw/workspace/youtube-automation/samples/kling-api/probe-assets/probe_512.png",
    "prompt": "A calm woman looks at the camera and slowly smiles, natural motion, clean lighting.",
    "duration": "5",
    "mode": "std",
    "aspect_ratio": "16:9",
    "external_task_id": "phase3-image2video_minimal-1774803401"
  },
  "response": {
    "error": "HTTP Error 400: Bad Request",
    "status_code": 400,
    "response_body": "{\"code\":1201,\"message\":\"File is not in a valid base64 format\",\"request_id\":\"b89dd80d-38e6-4561-9fb0-85ea533fb1b7\"}",
    "category": "malformed"
  }
}