curl --request POST 'https://xcompute.us/api/klingai/v1/images/multi-image2image' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model_name": "kling-v3",
    "prompt": "人物站在参考场景中央，保持面部特征一致",
    "subject_image_list": [
      {"subject_image": "https://example.com/person.png"}
    ],
    "scene_image": "https://example.com/scene.png",
    "n": 1
  }'