{
  "manageEntity": {
    "action": "Save",
    "entityId": "15841",
    "entityType": "Track",
    "nonce": "0x4471be168bc670ce64ab88132de4d34ba0144c3db4d543b12229a04bc2fca3b8",
    "signature": "0x7ff17dabc23aeab32812e435e947ceb259b22d8b91b73921347f7635d59e04840d4aa4e2757befbbf427b4da0d6bec9a332879de8dffcb0969053ec6de5a17a51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}