{
  "manageEntity": {
    "action": "Save",
    "entityId": "1473934068",
    "entityType": "Track",
    "nonce": "0x51b61ac92956d83a75b7256083888aceebc3823dd62c7d194c1e78a4ea3a61ba",
    "signature": "0xdbba24a5172cc89621d9e405d5d7638a9d1c5bddf9d825008d88fd5b30cb0fdf333dbc773d6c0ebd5b28c8e01fb175969e4561c710d79560e0c57360caf6cad61c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}