Zoom Contact Center populate agent name in outbound signature

We are setting up an email channel flow for Zoom Contact Center.  I would like to auto-populate the assigned agents name in the outbound email signature, rather than have each agent have their own signature or just one generic outbound signature.

I have a signature template saved into the Asset Library, but when I use the insert variable option in the template design, I cannot find the appropriate variable to use to pull in the current agents name on the engagement into that outbound signature.  I also tried the dynamic variable but to no avail.  

Anyone else try to dynamically populate the agents full name on an outbound signature template?  Not sure what I am missing and as of now support doesn't seem to have an answer.

Thanks!