curl --request POST \
  --url https://api.kie.ai/api/v1/mj/generateUpscale \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "taskId": "2584469c38e43c173dcae9e60663f645",
  "imageIndex": 0,
  "waterMark": "水印",
  "callBackUrl": "https://bd86f681ddfb.ngrok-free.app/api/v1/mj/test"
}'

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "mj_upscale_abcdef123456"
  }
}