Json file

[LucieWallee]

Hello,
I am trying to use this extension.
My problem is, I don't know how to write my structure in the Json file.

I write something like that ( I see this exemple of the second issue ) :
{"nodes": [ {"id":4070,"name":"123.","level":0,"type":"default"}, {"id":4005,"name":"1254.","level":0,"type":"default"} ] }

I have datas who are displays.

But When I click on the arrow I have this display :

It displays under the arrow the datas who are already display.

Furthermore I don't know how to write the childrens of a category.

Thank you for the future help.