Thanks for your answer
I think I didn't express me well..
I use the Parse dashboard to sent push.
I talk about Alert Notification that's displaying in the Status Bar of the mobile.
The json is well displaying in the debugtext app, but there're is no alert notification in the status bar.
That I wanted to do is open an url when the user touch the notification.
And I read on Parse that is possible for Android with a json:
"alert": "My message notification", "uri": "http://scirra.com"
But I found another way to do this.
However, I have new question about push notification...
If the app is closed on the device, whan I sent a simple text push notification, the notification(status bar) is not displaying, is it normal ?