{
  "manageEntity": {
    "action": "Save",
    "entityId": "317471303",
    "entityType": "Track",
    "nonce": "0xf057764cb44a03336dac0a3cf0ac42dc65a72c99421095e61d167a8084a8fa36",
    "signature": "0x1708201236cca445b55bc61961416c505bab359dbdea3980883353e92bac45a434c1b4c2c9a23d473526802534ad20f72ecd3225b705ee3585102e871b3a395c1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}