Update Items in Cart

curl --request PUT \
  --url https://client-request-service-staging-wghsjlqnoa-uw.a.run.app/cart \
  --header 'Content-Type: application/json' \
  --data '{
  "items": {
    "shopify_cart_items_input": [
      {
        "quantity": 1,
        "product_id": "12376205435060",
        "variant_id": "98765432109876"
      }
    ]
  },
  "id": "<string>"
}'

{
  "id": "<string>",
  "cost": {
    "is_estimated": true,
    "subtotal": {
      "value": 123,
      "display_value": "<string>",
      "currency": "<string>"
    },
    "tax": {
      "value": 123,
      "display_value": "<string>",
      "currency": "<string>"
    },
    "shipping": {
      "value": 123,
      "display_value": "<string>",
      "currency": "<string>"
    },
    "total": {
      "value": 123,
      "display_value": "<string>",
      "currency": "<string>"
    }
  },
  "buyer_identity": {
    "first_name": "<string>",
    "last_name": "<string>",
    "address_1": "<string>",
    "address_2": "<string>",
    "city": "<string>",
    "province_code": "<string>",
    "country_code": "<string>",
    "postal_code": "<string>",
    "email": "<string>",
    "phone": "<string>"
  },
  "stores": [
    {
      "store": "<string>",
      "request_id": "<string>",
      "cart_lines": [
        {
          "quantity": 123,
          "variant": {
            "id": "<string>",
            "title": "<string>",
            "marketplace": "<string>",
            "description": "<string>",
            "is_available": true,
            "price": {
              "value": 123,
              "display_value": "<string>",
              "currency": "<string>"
            }
          },
          "product": {
            "id": "<string>",
            "title": "<string>",
            "marketplace": "<string>",
            "description": "<string>",
            "is_available": true,
            "price": {
              "value": 123,
              "display_value": "<string>",
              "currency": "<string>"
            }
          }
        }
      ],
      "offer": {
        "subtotal": {
          "value": 123,
          "display_value": "<string>",
          "currency": "<string>"
        },
        "margin": {
          "value": 123,
          "display_value": "<string>",
          "currency": "<string>"
        },
        "not_available_ids": [
          "<string>"
        ],
        "shipping_methods": [
          {
            "id": "<string>",
            "label": "<string>",
            "price": {
              "value": 123,
              "display_value": "<string>",
              "currency": "<string>"
            },
            "taxes": {
              "value": 123,
              "display_value": "<string>",
              "currency": "<string>"
            },
            "total": {
              "value": 123,
              "display_value": "<string>",
              "currency": "<string>"
            }
          }
        ],
        "selected_shipping_method": {
          "id": "<string>",
          "label": "<string>",
          "price": {
            "value": 123,
            "display_value": "<string>",
            "currency": "<string>"
          },
          "taxes": {
            "value": 123,
            "display_value": "<string>",
            "currency": "<string>"
          },
          "total": {
            "value": 123,
            "display_value": "<string>",
            "currency": "<string>"
          }
        }
      },
      "is_submitted": true
    }
  ]
}