REST Adapter

I have a synchronous scenario (REST-> PI -> PROXY)

I am getting request data from source system in a URL

https://serveraddress.com/dymax/services/restfull/reroute/field1=field2=field3

Actual data comes in field1, field2 and field3 in URL

Example : https://serveraddress.com/dymax/services/restfull/reroute/Marilyn-1234-Manager

How to configure this in Sender Rest Adapter ?

Thanks