Before you start you have to consider some points
There are some actions that you need to trigger on some events
Production BaseUrl app.converted.in/magento/webhook
Testing BaseUrl test.converted.in/magento/webhook

Actions to trigger

When a new collection/category is added webhook
When a new user is registered webhook
When a new product is added/updated/stock changed webhook
When order is added or updated webhook

Request template

Request authorization should follow the following template