To audit changes in your content model, go to Environment settings > Audit log. The audit log stores changes made in the last 90 days.You can filter the events by date range, type of action, and type of object. You can also search through the filtered events. For example, you can find when a specific content type was updated and by whom.
Find the origin of changes
Every change in your audit log comes with information about its source. This can be either the UI or API. This way, you can determine whether the change was done by a user in the administration interface or programmatically.In addition to the source information, there's also the name. In case of changes via API, the name identifies a specific API key. Otherwise, it's a user name that users specify in their account settings.