User resource data model
/User
Dictionary table
The diagram service model of the object: http://www.soffid.org/doc/console/2.9.0/uml/com/soffid/iam/api/User.html
Soffid allows you to add customized data to the user object. You can do that on metadata, on the proper object.
It is allowed to consult all the User definition using the Schema query:
GET http://<your-domain>/webservice/scim2/v1/Schemas/urn:soffid:com.soffid.iam.api.User
Full JSON example
Visit SCIM User examples page