Email token in Send Email Campaign Flow Step
We have a need to have a single smart campaign, but we need to email to be different each time the campaign is executed. I noticed that the "Send Email" step in Flow step in Smart Campaigns seems to accept tokens, like so:

But I can't get it to work. I'm filling out the token (via the API) with the folder name and email name like so: My Folder.My Email
Has anyone been able to get this to work with a "my" token?
Thanks.