Adding GTM Pool members

I have tried adding GTM pool members at the time of creating the pool as well as adding them after the pool is created. For the life of me, I cannot figure out the string to send for pool members.

If I am creating the pool and adding the members after is it?:

{'name':pool_name, 'fullPath':'/Common/server_name:/virtual_server}

I need to know how to add members at the time of creating the pool so that the members is part of the post and I also need to understand how to add members after the pool is created.

Everything else works and I can add pools, wide-ip, servers, etc. all day long but the members part is killing me.

Any help is appreciated!!!