Hi @hashemi.rafsan, it is not directly possible.
The reason is:
When an entry X is modified, the retrieved response only yields information about entry X itself. If this entry X is referenced in other entries, there wouldn’t be a direct way to be notified of it.
A workaround would be:
If you control the webhook listener, as you’re notified that entry X was changed, subsequently retrieve all entries that reference it: https://www.contentful.com/developers/docs/references/content-delivery-api/#/reference/search-parameters/links-to-entry