curl --request POST \
  --url https://api.kie.ai/api/v1/runway/extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "taskId": "ee603959-debb-48d1-98c4-a6d1c717eba6",
  "prompt": "猫继续以更多的能量和兴奋感跳舞，旋转着，彩色光效更加强烈",
  "imageUrl": "https://file.com/m/xxxxxxxx.png",
  "expandPrompt": true,
  "waterMark": "kie.ai",
  "callBackUrl": "https://api.example.com/callback"
}'

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "ee603959-debb-48d1-98c4-a6d1c717eba6"
  }
}