This action allows you to send any custom data to a user widget. This data may be handled later using the widget callback method `onPayloadReceived`. You may define your own function that will handle incoming data during widget initialization, e.g.:
We use templates for data so you can use context tags that will be replaced by user attributes for which the action was called, e.g. receiver.name or receiver.last_seen, much the same as in our email templates.