InvoiceItemRef

{
    "InvoiceItem": [
        {
            "id": 0,
            "invoice_id": 0,
            "item": "string",
            "description": "string",
            "unit_price": 0,
            "quantity": 0,
            "tax1": 0,
            "tax2": 0,
            "summary_tax1": 0,
            "summary_tax2": 0,
            "subtotal": 0,
            "product_id": 0,
            "col_3": null,
            "col_4": null,
            "col_5": null,
            "created": "2018-05-10 00:42:00",
            "modified": "2018-05-12 13:05:06",
            "discount": 0,
            "discount_type": "1 => Percentage",
            "store_id": "The invoice store id",
            "calculated_discount": 0
        }
    ]
}