This parameter specifies a list of devices (registration tokens,
or IDs) receiving a multicast message. It must contain at least
1 and at most 1000 registration tokens.
Use this parameter only for multicast messaging, not for single
recipients. Multicast messages (sending to more than 1
registration tokens) are allowed using HTTP JSON format only.
This parameter specifies a list of devices (registration tokens, or IDs) receiving a multicast message. It must contain at least 1 and at most 1000 registration tokens.
Use this parameter only for multicast messaging, not for single recipients. Multicast messages (sending to more than 1 registration tokens) are allowed using HTTP JSON format only.