It looks like we do have this exact tag in our Tag marketplace. If you search for MediaMind, you will see the Versa Tag version as a choice to add to your Tealium IQ.
Did you all ready try this tag and it doesn't fit your implementation needs? If so, there is a way to implement that script with our generic tag, but I first wanted to check to see if you had seen the tag in our marketplace.
Right now we are trying to use the VersaTag tag and the agency is validating if it works correctly. We will see if it works or not.
My idea would be to create some tag where I could include any HTML code. I don't know if this is possible.