The cn1 developer guide says
...but if you click "OK" in the dialog, your push() callback will be run. Clicking OK is analogous to the user tapping on the notification.
This is in case if Ok button action was not set up and it just opens the app in a state that it was left.
But what if I want to have different, specific actions by tapping on the button and on the notification message itself? Regular buttons have .getActionId(), but what about the push notification itself?