There are 3 payload options in 4 variations available.
None
You can choose this for action types like Shutdown which don’t need any payload to be sent to the device while triggering the action.
JSON
You can choose this for action types which need the JSON payload to be sent to the device while triggering the action.
JSON Data via form
You can choose this for action types like Update CAN Config which enables the JSON data to be sent via form to the device while triggering the action.To choose this option, choose JSON option from the dropdown, enable the Allow user to input data via form toggle and enter the JSON Schema along with JSON UI Schema while creating or editing the action type
Text
You can choose this for action types which need the payload in text format to be sent to the device while triggering the action.