{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122840412",
    "entityType": "Track",
    "nonce": "0xcf1eb5ff0fb46de256f4b0781ff162b59927daa3b7ec113b9c9407ec6cad6217",
    "signature": "0xab8118b8a6131a58ec815fef6c0fc86f5c38a0d6b75bee454f8dcc683773273064de4a7d37e6019f13d86d56adbbe0007a452664f1a8bc68fad3ebe8141b65f81c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}