Preview an event hook
Troubleshoot how your code responds to an event by editing the JSON payload before delivering the payload.
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In the Admin Console, go to .
 - In the list of event hooks, click Actions for the event hook you want, and then select Preview.
 - If the event hook isn't verified, click Verify endpoint ownership.
 - In the Event Type dropdown menu, select an event.
 - 
                    In the System Log Event dropdown menu, select an available System Log event.  
This populates the preview JSON payload. If no System Log events are available, the preview uses sample JSON.
 - Optional. In the JSON section, click Edit, and then modify the JSON payload. 
Undetermined fields are set to null and can be replaced with custom values for testing.
 - Click Save.
 - Click Deliver Request. The page displays the status of the event hook request.
 
