code: def changelist_view(self, request, extra_context=None):
          
          extra_context = extra_context or {}
          if 'object' in request.GET.keys():
              value = request.GET['object'].split(':')
              content_type = get_object_or_404(
                  ContentType,
                  id=value[0],
              )
              tracked_object = get_object_or_404(
                  content_type.model_class(),
                  id=value[1],
              )
              extra_context['tracked_object'] = tracked_object
              extra_context['tracked_object_opts'] = tracked_object._meta
          return super(TrackingEventAdmin, self).changelist_view(
              request, extra_context)
docs: Get object currently tracked and add a button to get back to it