Optional. JSON data to be passed through to the immersive experience
web page as an event.
If the "override" field in the containing prompt is "false" data values
defined in this Canvas prompt will be added after data values defined in
previous Canvas prompts.
Optional. JSON data to be passed through to the immersive experience web page as an event. If the "override" field in the containing prompt is "false" data values defined in this Canvas prompt will be added after data values defined in previous Canvas prompts.