{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817180428",
    "entityType": "Track",
    "nonce": "0xdf3513e8211e1217c6d0e5adc6bab1699bc10a3c0e0a35577676811016b2d33a",
    "signature": "0x56b1575bf0c21058f45d45098258a876ba948b56dda0819c95be10353e948a292a5048ca970f23cb75cd3cccda1b9ca6725a71049b941095c0dd065ae8ac65701b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}