Together with reports from the web interface and a batch email overnight, you can enable forward to get real-time notification of each push notification status change (Receive Delivery Statuses section in the application panel).
Each callback contains: the messageId generated during sent, the identifier of the recipient, the new status and, eventually, the recipientRef that can optionally be set while creating the push message, the InReplyToMessageId with contains the message ID of the reply that can be sent from the SDK and the Channel set while sending the message (three optional fields).
By this interface you can get a CURL request example.
For more details about the callback format and parameters, see Message Notifications.
For more information about push notifications and configuration parameters, see the Send quickstart or the API documentation.
