{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121919",
    "entityType": "Track",
    "nonce": "0x826b19b817f0c8d616092b0960d306ed95e008ed6b20956454f35ace7566749e",
    "signature": "0x9f971780e831318f8fb750cc1e17daad0eb34bd66a68344ac90b17c7eb47a354309e8b296ea8ff784b0818da857e2704f040dcde39b2e51530cdacdd52c7dfcc1c",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}