{
            "ship_name": "spob",
            "cargo_types": [
                {
                  "type" : "caustic_soda",
                  "unit_mapping":
                    [
                      {
                        "base": "length",
                        "name": "meter",
                        "symbol": "m"

                      },
                      {
                        "base": "lumpSum",
                        "name": "lumpsum",
                        "symbol": "LM"

                      }

                    ]

                }
            ]
        }