BillingInvoiceModel

{
    "proformaId": 0,
    "proformaNumber": "string",
    "invoiceId": 0,
    "invoiceNumber": "string",
    "issued": "2019-08-24T14:15:22.123Z",
    "due": "2019-08-24T14:15:22.123Z",
    "totalWithVat": 0,
    "totalWithoutVat": 0,
    "totalVat": 0,
    "currency": "string",
    "status": "Draft"
}