Using current timestamp in a function

Using current timestamp in a function

I have a function that changes layout based on certain values, which works fine with a schedule. 

I added another field to be updated with a timestamp. Function is saved successfully but it's not working, but it also doesn't return any errors:

This is the line I changed:

{"Layout":"3253392000000154479","Automation_ran_at":zoho.currenttime});

zoho.currenttime seems not to work, I also tried using now(), or just now but no luck either