curl --request GET \
  --url https://proxy.innk.cc/suno/act/midi/{clip_id} \
  --header 'Authorization: Bearer <token>'

{
  "state": "<string>",
  "instruments": [
    {
      "name": "<string>",
      "notes": [
        {
          "pitch": 123,
          "start": 123,
          "end": 123,
          "velocity": 123
        }
      ]
    }
  ]
}