...
Navigate to Jira's top menu, and click Apps.
Select Manage your apps.
In the sidebar, locate and click Easy Integrations configuration.
Select Script Console from the app’s top menu.
...
Within the Script Console, you'll find various tabs to streamline the testing process. These tabs are:
...
Event
In the Event tab, you can configure incoming webhook event data. Then you can refer to it with data.event. This data can then be seamlessly integrated into your script field, allowing you to test the handling of events.
...