curl --request GET \
  --url https://api.kie.ai/api/v1/midi/record-info \
  --header 'Authorization: Bearer <token>'

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "5c79****be8e",
    "recordTaskId": -1,
    "audioId": "e231****-****-****-****-****8cadc7dc",
    "callbackUrl": "https://example.callback",
    "completeTime": 1760335255000,
    "midiData": {
      "state": "complete",
      "instruments": [
        {
          "name": "Drums",
          "notes": [
            {
              "pitch": 73,
              "start": 0.036458333333333336,
              "end": 0.18229166666666666,
              "velocity": 1
            },
            {
              "pitch": 61,
              "start": 0.046875,
              "end": 0.19270833333333334,
              "velocity": 1
            }
          ]
        },
        {
          "name": "Electric Bass (finger)",
          "notes": [
            {
              "pitch": 44,
              "start": 7.6875,
              "end": 7.911458333333333,
              "velocity": 1
            }
          ]
        }
      ]
    },
    "successFlag": 1,
    "createTime": 1760335251000,
    "errorCode": null,
    "errorMessage": null
  }
}