{
  "item": {
    "customer_detail": [
      "logo",
      {
        "field": "in_invoice_address"
      }
    ],
    "item": {
      "customer_delivery_address": [
        "logo",
        {
          "label_field": "in_delivery_address"
        }
      ],
      "invoice_detail": {},
      "header": [
        "customer_detail",
        "customer_delivery_address",
        "invoice_detail"
      ],
      "row_area": [
        "invoice_row_header",
        "invoice_row"
      ],
      "last_page_footer": [
        "invoice_info",
        "invoice_sum",
        "vat",
        "payable"
      ]
    },
    "form": {
      "name": "invoice",
      "_description": "how to express invoice pdf",
      "structure": [
        "header",
        "row_area",
        "last_page_footer",
        "footer"
      ]
    }
  }
}
