code: def subnet_2_json(self):
          
          LOGGER.debug("Subnet.subnet_2_json")
          json_obj = {
              'subnetID': self.id,
              'subnetName': self.name,
              'subnetDescription': self.description,
              'subnetIP': self.ip,
              'subnetMask': self.mask,
              'subnetRoutingAreaID': self.routing_area_id,
              'subnetIPAddressesID': self.ipAddress_ids,
              'subnetLocationsID': self.loc_ids,
              'subnetOSInstancesID': self.osi_ids
          }
          return json.dumps(json_obj)
docs: transform ariane_clip3 subnet object to Ariane server JSON obj
          :return: Ariane JSON obj