windows phone 8 - How can I send arbitrary data through a push notification? -

i need send data windows phone 8 app. want implement through push notifications.

i'm serializing data json , place in wp:param field in push notification. while app running in foreground, receive notification fine, can deserialize field , use data.

however, when app isn't in foreground, toast won't displayed @ all. when remove wp:param field notification, toast appear again, i'm assuming wp8 doesn't me putting json data in wp:param field.

how can send data , still have toast appear if app isn't in foreground.

the value provided in wp:param has url windows phone process , display toast.

the valid formats are:

• /page1.xaml – defines screen navigate in app when app starts. string must begin "/".
• /page1.xaml?value1=1234 &value2=9876 – defines screen navigate when app starts, along name/value pairs of info. string must begin "/".
• ?value1=1234 &value2=9876 – contains name/value pairs of info passed default start screen of app. string must begin "?".