RIPE Database usage

Hello List, forgive me if this is a question that doesn't belong here, but maybe someone can point me in the right direction. I have started maintaining my own nameserver a few months ago and the company that does the second level domain connections for me doesn't seem to be able to help me with this: how can I change the information in the maintainer object of my own RIPE record? In fact, I would like to create my own maintainer object. Is there any documentation maybe on who/how to change that information in the RIPE database? TIA Wolf-Guido Lutz