{
  "manageEntity": {
    "action": "Save",
    "entityId": "633509",
    "entityType": "Track",
    "nonce": "0x65e7d461254810259f58e40a01b19dfefa2f7c19f5a167c24d03149e72295e18",
    "signature": "0xaa632b97235bc42d224dbfb40b264cf93f5e91e87619a7757780513c8f36faad677a8c3144fd35e76e702a451f6bf4b98cb01c00214c83736232f4ba9f4acfef1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}