thanks for your hint. Indeed you can create webhooks V1 in the dashboard. These webhooks monitor all objects of the service account.
If you want to get notified for certain folders or files, you have to create the webhook configuration via API.
To monitor certain folders or files make sense if you use AWS Lambda where you pay for the number of requests. The webhooks V1 will send you a lot of events- you have to find out if these messages are of interest for you.