curl --request POST \
  --url https://api.highwayapi.ai/v3/async/mj-outpaint \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "image_no": 123,
  "task_id": "<string>",
  "remix_prompt": "<string>",
  "scale": 123
}
'

{
  "task_id": "<string>"
}