{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425801247",
    "entityType": "Track",
    "nonce": "0x96aff02dd059da591851f3377691a01dc0fddb38fdc4bceea2232f9f2eef5acb",
    "signature": "0x5c87e72266237777a24f34db8902b653a8e7b4f8db354c5dd408d54036202c243954f40e80114bf7ee1b7e68dada7dc32baf1ce3c0020ec0718a3d515f1496b21c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}