For the more straightforward entities, such as Mobile Users we have implemented Create and Update actions on these entities so that new instances may be created and/or attributes can be updated.
HTTP POST and HTTP PUT verbs are used in the normal REST fashion to map to Create and Update actions. The Swagger interface describes the structure of these entities and the examples in GitHib will give you a starting point for understanding how they can be utilised
Where we are performing an action rather than a simple state update, such as a password reset or the allocation to a user group, these are implemented as POST methods whilst taking additional data via the URL or post variables