[
    {

        "doctype": "Custom Field",
        "dt": "Item",
        "fieldname": "manuf_item_code",
        "fieldtype": "Data",
        "insert_after": "stock_uom",
        "label": "Manufacturer Item Code",
        "name": "item_manuf_item_code"
       },
       {

        "doctype": "Custom Field",
        "dt": "Item",
        "fieldname": "manuf_product_url",
        "fieldtype": "Data",
        "insert_after": "manuf_item_code",
        "label": "Manufacturer URL",
        "name": "item_manuf_url",
        "options": "URL"
       }
    ]