{
  "manageEntity": {
    "action": "Save",
    "entityId": "2128122550",
    "entityType": "Track",
    "nonce": "0x015c00e090e154d4673f7066aa094df9bcb5edf2dcd6513a12316d356cdb7c2e",
    "signature": "0x12909d387144f8a59fee636612ef6dc4bb7b03a700c52b172d99deec8d2a807f5ead331b5fa8942e773d4446687768dae16c667677bbde850ba490029916f0dd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}