code: def schedule_blast_from_blast(self, blast_id, schedule_time, options=None):
          
          options = options or {}
          data = options.copy()
          data['copy_blast'] = blast_id
          data['schedule_time'] = schedule_time
          return self.api_post('blast', data)
docs: Schedule a mass mail blast from previous blast
          http://docs.sailthru.com/api/blast
          @param blast_id: blast_id to copy from
          @param schedule_time
          @param options: additional optional params