Additional characters beyond this specified length will be truncated. Due to a software limitation, if the message body is greater than 4096 bytes, the message itself will be an attachment in the push notification.

Optional — overrides the badge for messages sent (usually seen in the notification bar on mobile devices) By default, the site's configured "touch icon" is sent.

Optional — overrides the icon for messages sent (can be used for branding, etc.) By default, the site's configured "touch icon" is sent.