READ : Allow user to view this Group
CREATE : Allow user to create new resource below this Group
UPDATE : Allow user to edit this Group
DELETE : Allow user to delete this Group

Resource has permissions :	READ	CREATE	UPDATE	DELETE	Action
ls://dev.artenum.com/groups/groups-reader					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/groups-manager					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/manager					Edit -  Delete -  (recursive)
ls://dev.artenum.com/groups/reader					Edit -  Delete -  (recursive)
ls://dev.artenum.com/users/guest					Edit -  Delete -  (recursive)

    (owner has all permissions)