const inputBody = '{
  "type": "object",
  "properties": {
    "params": {
      "type": "object",
      "required": [
        "lineNumber",
        "itemType",
        "quantity"
      ],
      "properties": {
        "lineNumber": {
          "type": "string",
          "description": "Line number of the item"
        },
        "itemType": {
          "type": "string",
          "description": "Type of the item"
        },
        "quantity": {
          "type": "number",
          "description": "Quantity of the item"
        },
        "comments": {
          "type": "string",
          "description": "Additional comments",
          "nullable": true
        },
        "salesOrder": {
          "type": "string",
          "description": "Sales order reference",
          "nullable": true
        },
        "purchaseOrder": {
          "type": "string",
          "description": "Purchase order reference",
          "nullable": true
        }
      }
    }
  }
}';
const headers = {
  'Content-Type':'application/json',
  'Accept':'application/json',
  'Authorization':{
  "type": "string"
}
};

fetch('https://goldleaf.app/api/v1/workorder/{workOrderId}/item/{itemId}/update',
{
  method: 'POST',
  body: inputBody,
  headers: headers
})
.then(function(res) {
    return res.json();
}).then(function(body) {
    console.log(body);
});