How to use Piranha like a data container with a relations between data and how to create a new section?

[biapar]

How to use Piranha like a data container with a relations between data and how to create a new section to manage ( crud ) data?
I tried to customize the Standard Page but I think that it's not the right solution.
Thanks.

[tidyui]

Could you specify a bit more what you’re trying to do?

[biapar]

I wish use Piranha as a data management and in/out data by RestApi. The backoffice with roles can access to the panel to review the data. Some data have relation with other data.