curl --request POST \
  --url https://api.acedata.cloud/veo/extend \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "video_id": "video-uuid-xxx",
  "model": "veo31-fast"
}
'

{
  "data": {},
  "success": true
}