Optional
idempotencyOptional identifier used to dedupe messages for idempotency. If this is specified, messages sent after the first appearance of the value will be dropped. The initial request to queue this broadcast will still succeed. We recommend using UUID generators.
A dictionary of variables for each target destination. These values are used to render each target destiation.
Topic name to publish to. Users that subscribed to this topic name, will receive the alert.
Contains the message to broadcast.