How to implement document content protection (restrict editing) in ONLYOFFICE

I would like to inquire about the document protection feature. I want to prevent users from modifying the cover page while allowing editing of the rest of the document.
ONLYOFFICE Version: [Version Number, e.g. 9.4]
Deployment Environment: [Document Server]
File Format: [docx]
Could you please guide me on how to achieve this functionality? Are there any specific API methods or UI options that can support this use case?
Thank you!