{
  "manageEntity": {
    "action": "Save",
    "entityId": "212",
    "entityType": "Track",
    "nonce": "0xee89729721e71e7abf6a75883c0ec42f4f5f7ac37f61d66adb30ce74a385f71d",
    "signature": "0x5a0380fc7e8c96b16617ff937defa70a8595adcef07a2b56589c7c66444351fe7801db1113dbef008344bc83dda3650bac727b7a8a9a2c4b80cd075142b059e81c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}