@Booee:
We don't currently have any services available to upload your own offline draft results, sorry. It definitely makes sense as a service to offer, but I can't make any promises as to when we'd be able to figure out how that should work and get it available to the public.
@Pickemfirst Dev:
However, we do actually currently support being able to edit your roster through the services, and I think that we just forgot to get that into our documentation. I'll do my best to get that updated when I have a chance.
(basic idea is that you can PUT up a new roster resources with the appropriate changes in place, but it would probably be easier to just wait for the documentation instead of trying to guess at what the format is supposed to be)