Creating a data management area (insert|Edit|Delete) within the Control Panel

Question:
Can I create a data management area (insert|Edit|Delete) within the Control Panel? For example:

Admin-MySite > Countries > Insert|Edit|Delete Countries

States > Insert|Edit|Delete States
Cities > Insert|Edit|Delete Cities

Look, I dont want protected dynamic pages inside the site. I want use the Control Panel.

Product:
Wix Studio Editor

What are you trying to achieve:
I want to manage my website data (insert, edit, delete) from the Control Panel. The website will have queries to the databases that I enter through the control panel.

What have you already tried:
I have already created the pages within the Control Panel, and now I need to enter the data. I created the CMS, made the connections, but the fields do not let me enter the data.

Additional information: