One accepted widget submission, surfaced by the board/host WidgetSubmitted output.
WidgetSubmitted
The submitted payload, JSON-serialized (capped at WHITEBOARD_WIDGET_SUBMIT_MAX_CHARS).
The submitting widget's board item ID (e.g. html-2).
html-2
The widget's header title ('' when untitled — consumers fall back to ItemID).
One accepted widget submission, surfaced by the board/host
WidgetSubmittedoutput.