How can I check the data.aps contents from the push notification that is recieved?

[adam griffin]

I am trying to use server code to send a user_id and a greeting through server code push notification. I would like to be able to check the id when a notification is received by the app and compare the id to the apps local storage id. Is there a way to accomplish some how by using data.aps that is in the push notification event.