LoadRunner with Salesforce Lightning

We are trying to simply log in, get a member, change a value, and log out. The tests "pass" but no value is changed. Has anyone had success using LoadRunner with Salesforce Lightning?
I noticed an aura.token that appears to be dynamic (like a session id). I assume we should capture and then parameterize that value. Are there other values (FWUID, for example) that are required to complete transactions?
We did contact Salesforce to inform them that we would be testing, but they aren't much help.
Thanks for any input.