curl --request PUT \
  --url https://api.soundpiece.co/create.new_midi_song \
  --header 'Content-Type: application/json' \
  --data '
{
  "idempotency_key": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "prompt": "<string>",
  "callback": {
    "url": "<string>",
    "context": {}
  }
}
'

{
  "computation": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "status": "generating",
    "raw_midi": "<string>"
  }
}