Smart Value for expand macro

[Petra Hasler]

Hello everyone, 

I am building an automation in our Jira Service Management project. 
Now I am stuck when it comes to formatting the internal comment that should be added, as part of the automation: I want the expand macro in the comment, but I am unable to find the correct smart value to add it to the comment. 

Does someone know what the smart value for the expand macro for this is? 

Thanks so much!
BR Petra