[otrs] Set DynamicField value via SOAP

Hello, I'm trying to set DynamicField value using SOAP. I haven't found any information on this in OTRS API docs (dev.otrs.org). I consider DynamicFieldValueObject to be an object and ValueSet - a method that should be used but RPC output says "No such Object DynamicFieldValueObject". Could someone please help me? Regards, Boris