Create Streams and Baselines in DNG using OSLC API

When GC is enabled in DNG project area i can get the Baselines and Stream information using oslc api,

https://localhost/rm/rm-projects
Inside a project area -  <oslc_config:component> tag contains
https://localhost/rm/cm/component/_ptFHQPRGEeahn5AHExXALw
For Streams and Baselines i collected configuration details,
https://localhost/rm/cm/component/_ptFHQPRGEeahn5AHExXALw/configurations in which i can get the stream and baseline information using GET operation

But when i tried to update / create stream or baselines using PUT/POST operations then i am getting  405 Method Not Allowed error.