PushDelegate.cs

    public class PushDelegate : IPushDelegate
    {
        private readonly Lazy<INotificationManager> _notificationManager;

        public PushDelegate(Lazy<INotificationManager> notificationManager)
        {
            _notificationManager = notificationManager;
        }

        public async Task OnEntry(PushEntryArgs args)
        {
        }

        public async Task OnReceived(IDictionary<string, string> data)
        {
            // Verificamos se existe a propriedade no json, para mostrar ou nao a notificacao
            var showNotification = false;
            if (data.ContainsKey("show_notification"))
            {
                _ = bool.TryParse(data["show_notification"], out showNotification);
            }

            var title = "default notification title";
            var message = "default notification message";

            // Podemos ter dados mais complexos e deserializar eles, caso necessário
            if (data.ContainsKey("title"))
                title = data["title"];

            if (data.ContainsKey("title"))
                message = data["message"];

            var notification = new Notification
            {
                Title = title,
                Message = message,
                Payload = data?.ToDictionary(
                        x => x.Key,
                        x => x.Value
                    )
            };

            await _notificationManager.Value.Send(notification);
        }

        public Task OnTokenChanged(string token)
        {
            return Task.CompletedTask;
        }
    }