{
  "manageEntity": {
    "action": "Save",
    "entityId": "1032909",
    "entityType": "Track",
    "nonce": "0x57389eb020352b1cd95c96a21a6c95a95c20b303177906c8b98e7d836fe5637d",
    "signature": "0x764f9c52486131bc51a47ea41b85fed761801cf7095256647c41bf3b704106af46b3ce2557ddb7f12f37ecb2f1ead3e7e1ab18afc768db32e56d69a9d2f32b6b1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}