{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896999759",
    "entityType": "Track",
    "nonce": "0xbe9754202c8b8dcd13e0dab174438868dc9e6cbfb5b969f27876b2de1b7604d5",
    "signature": "0xd8140daf8d551d555c7065f4bc1c07722ed0d5546c9225c4f0fb7f3cc0a4852b6f23caa970f4e0dc9844ff37243d4e91f8d6cf4c83cd0f4f417969bc5d0eff521c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}