Hello @Lostboi and welcome to our community.
We are still expanding our documentation. And in the near future it will be ready 
In the attachment you will find examples of how to create types, objects, categories via Rest and which properties (validation of incoming data is done via Ceberus) are required.
Type Requests:
type_schema.txt (5.0 KB)
put_type.txt (1.2 KB)
post_type.txt (1.2 KB)
Object Requests:
put_object.txt (436 Bytes)
post_object.txt (405 Bytes)
object_schema.txt (1.1 KB)
Category Requests:
put_category.txt (447 Bytes)
post_category.txt (391 Bytes)
category_schema.txt (981 Bytes)