{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216311170",
    "entityType": "Track",
    "nonce": "0x4e67deb2ac0197af3b3c70e78872e002bc376a99a1cd3e5b8677c5636f5b0e02",
    "signature": "0xeb7e1cd1a037772d80cefe15f2d695116a9a4c8c42ba5e11ea7da918fcdc3c7f54cfba2ed412980a8cb17f335bd0f3bed2bd3b9080890690fec1534dc147e5f21c",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}