I added to all my pages the following:
<!-- Google Tag Manager Data Layer -->
<script>
dataLayer=[{'author': 'abc'}]
</script>
<!-- End Google Tag Manager Data Layer -->
I set up in Google Tag Manger the following Variable:
so that I get to this situation:
Then I set my Universal Analytics tag as follows:
The tag is set up in order to be fired at every page view. When I reload the page I see that my Data Layer contains the "author":
But if I check the tag in Google Tag Assistant I don't see the expected field.



