Hello @Kartheek_Desineedi and @Shitanshu_Jain
Looks like it has been missed somehow due to any reason. Trying to help you with answer.
Precisely, there is not any test listener endpoint available to proceed directly, but a detailed step by step guide to get the same since each account’s activity needs to be performed and owned by the owner.
However, With purpose of testing the webhook, you only need to add one or a few entities (Location Entity type for example) in Content, and then you will be able to proceed further with setting the Webhook successfully and perform the testing activities needed to check.
Also, for your convenient the available Endpoints for webhook can be checked here on URL Content Endpoints | Hitchhikers
Hope it will help.