MoM is not up to date , it works with the old API, the one used for the Managerv3. The new manager uses a new API.
So at the moment, the only ways to use the manager functions are the new Web Control Panel and the API
here
We don't recommend the use of MoM anylonger, though for some features, it may still be fully functional (the ones that are still only available on the old customer interface).
Thanks