docs: def create_from_template(self, client_id, subject, name, from_name,
                               from_email, reply_to, list_ids, segment_ids, template_id, template_content):
          """Creates a new campaign for a client, from a template.
  
          :param client_id: String representing the ID of the client for whom the
            campaign will be created.
          :param subject: String representing the subject of the campaign.
          :param name: String representing the name of the campaign.
          :param from_name: String representing the from name for the campaign.
          :param from_email: String representing the from address for the campaign.
          :param reply_to: String representing the reply-to address for the campaign.
          :param list_ids: Array of Strings representing the IDs of the lists to
            which the campaign will be sent.
          :param segment_ids: Array of Strings representing the IDs of the segments to
            which the campaign will be sent.
          :param template_id: String representing the ID of the template on which
            the campaign will be based.
          :param template_content: Hash representing the content to be used for the
            editable areas of the template. See documentation at
            campaignmonitor.com/api/campaigns/#creating_a_campaign_from_template
            for full details of template content format.
          :returns String representing the ID of the newly created campaign.
          """
          body = {
              "Subject": subject,
              "Name": name,
              "FromName": from_name,
              "FromEmail": from_email,
              "ReplyTo": reply_to,
              "ListIDs": list_ids,
              "SegmentIDs": segment_ids,
              "TemplateID": template_id,
              "TemplateContent": template_content}
          response = self._post("/campaigns/%s/fromtemplate.json" %
                                client_id, json.dumps(body))
          self.campaign_id = json_to_py(response)
          return self.campaign_id