code: def create_hit(
          self,
          title,
          description,
          keywords,
          reward,
          duration_hours,
          lifetime_days,
          ad_url,
          notification_url,
          approve_requirement,
          max_assignments,
          us_only,
          blacklist=None,
          annotation=None,
      ):
          
          frame_height = 600
          mturk_question = self._external_question(ad_url, frame_height)
          qualifications = self.build_hit_qualifications(
              approve_requirement, us_only, blacklist
          )
          # We need a HIT_Type in order to register for REST notifications
          hit_type_id = self.register_hit_type(
              title, description, reward, duration_hours, keywords, qualifications
          )
          self.set_rest_notification(notification_url, hit_type_id)
  
          params = {
              "HITTypeId": hit_type_id,
              "Question": mturk_question,
              "LifetimeInSeconds": int(
                  datetime.timedelta(days=lifetime_days).total_seconds()
              ),
              "MaxAssignments": max_assignments,
              "UniqueRequestToken": self._request_token(),
          }
          if annotation:
              params["RequesterAnnotation"] = annotation
  
          response = self.mturk.create_hit_with_hit_type(**params)
          if "HIT" not in response:
              raise MTurkServiceException("HIT request was invalid for unknown reason.")
          return self._translate_hit(response["HIT"])
docs: Create the actual HIT and return a dict with its useful properties.