Fetching Shipping Zones From a Platform

{
  "content": [{
    "external_id": "457216524578",
    "name": "Domestic",
    "display_order": 1,
    "enabled": true,
    "regions": [{
      "name": "United States",
      "code": "US",
      "type": "COUNTRY",
      "enabled": true,
      "display_order": 1,
      "sub_regions": [{
        "name": "Washington",
        "code": "WA",
        "type": "PROVINCE",
        "enabled": true,
        "display_order": 55,
        "metadata": [{
            "type": "STRING",
            "key": "tax_name",
            "value": "State Tax"
          },
          {
            "type": "DECIMAL",
            "key": "tax",
            "value": 0.065
          },
          {
            "type": "DECIMAL",
            "key": "tax_percentage",
            "value": 6.5
          }
        ]
      }],
      "metadata": [{
          "type": "DECIMAL",
          "key": "tax",
          "value": 0.0
        },
        {
          "type": "STRING",
          "key": "tax_name",
          "value": "Federal Tax"
        }
      ]
    }],
    "methods": [{
        "external_id": "641084293410",
        "name": "Free Ground Shipping Over $50",
        "price": 0,
        "type": "PRICE",
        "min_price": 5000,
        "price_type": "SUBTOTAL"
      },
      {
        "external_id": "641084326178",
        "name": "Economy",
        "price": 490,
        "type": "WEIGHT",
        "min_weight": 0.0,
        "max_weight": 5.0,
        "weight_unit": "POUND"
      },
      {
        "external_id": "641084358946",
        "name": "Economy",
        "price": 1990,
        "type": "WEIGHT",
        "min_weight": 5.0,
        "max_weight": 70.0,
        "weight_unit": "POUND"
      },
      {
        "external_id": "641084457250",
        "name": "First Class Package",
        "carrier_name": "USPS",
        "type": "CARRIER",
        "metadata": [{
            "type": "DECIMAL",
            "key": "percent_modifier",
            "value": 0.0
          },
          {
            "type": "DECIMAL",
            "key": "flat_modifier",
            "value": 0.0
          }
        ]
      },
      {
        "external_id": "641084457250",
        "name": "Priority Mail Express",
        "carrier_name": "USPS",
        "type": "CARRIER",
        "metadata": [{
            "type": "DECIMAL",
            "key": "percent_modifier",
            "value": 0.0
          },
          {
            "type": "DECIMAL",
            "key": "flat_modifier",
            "value": 0.0
          }
        ]
      },
      {
        "external_id": "641084457250",
        "name": "Priority Mail",
        "carrier_name": "USPS",
        "type": "CARRIER",
        "metadata": [{
            "type": "DECIMAL",
            "key": "percent_modifier",
            "value": 0.0
          },
          {
            "type": "DECIMAL",
            "key": "flat_modifier",
            "value": 0.0
          }
        ]
      }
    ],
    "free_shipping": {
      "enabled": true,
      "min_price": 5000,
      "price_type": "SUBTOTAL",
      "exclude_products_with_custom_shipping": true
    }
  }]
}