curl --request POST \
  --url https://api.ttapi.io/flowmusic/v1/extend \
  --header 'Content-Type: application/json' \
  --header 'TT-API-KEY: <api-key>' \
  --data '
{
  "clip_id": "<string>",
  "extend_from_s": 123,
  "extend_s": 123,
  "instruction": "<string>",
  "model": "Lyria 3 Pro",
  "title": "<string>",
  "seed": "<string>",
  "hook_url": "<string>"
}
'

{
  "status": "SUCCESS",
  "message": "success",
  "data": {
    "job_id": "job_id"
  }
}