public void setPayload(Map<String,Object> payload)
The payload, expressed as a map of key-value pairs.
Payload parameters can be different for each mobile OS vendor. For more information on Apple’s payload parameters, search for “Apple Push Notification Service” at https://developer.apple.com/library/mac/documentation/.
To create the payload for an Apple device, see the PushNotificationPayload Class.
See the Push Notification Example.