{
  "manageEntity": {
    "action": "Save",
    "entityId": "990706",
    "entityType": "Track",
    "nonce": "0xf11897b98afd9ee3966bf950079802dc2d8075a14859fb2792c636d0594dbe9c",
    "signature": "0x8d9a03d3b4f2022619dcc476736a58486cc021d76bc8286500de1f891cb592b92985ee6abe25f90b49fbb2aefac357b67ada0427f1d523f90d7564a3a75d8d921c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}