{
  "manageEntity": {
    "action": "Save",
    "entityId": "1074909080",
    "entityType": "Track",
    "nonce": "0xef64881a41970cadc6156c1a8a521f64737f343d916543f45eb9d731426c6e00",
    "signature": "0x4fa4b751d78da33a55b275d9778c09b654e8c21b9e7867023aad12577c236c7214e58bd56b99e6b14301b2d1f41690db4b085efc041b318dc11acc19347d5edc1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}