SeatEngine

Trade desk universal pixels look something like this:

<div id="ttdUniversalPixelTagd13cc55cb7554d7eb6083fca2e7ae848" style="display:none">
  <script src="https://js.adsrvr.org/up_loader.1.1.0.js" type="text/javascript"></script>
  <script type="text/javascript">
      (function(global) {
          if (typeof TTDUniversalPixelApi === 'function') {
              var universalPixelApi = new TTDUniversalPixelApi();
              universalPixelApi.init("<advertiser_id>", ["<pixel_id>"], "https://insight.adsrvr.org/track/up", "<internal_id>");
          }
      })(this);
  </script>
</div>