curl --location 'https://api.techrar.com/order/v1/merchant/invoices/config/' \
--header 'app-id: 4' \
--header 'Authorization: Bearer <token>'{
"id": 1,
"custom_fields": null,
"vat_number": "333333333333333",
"invoice_reference_details": {
"company_id": 1029,
"invoice_prefix_id": 656
},
"einvoicing_enabled": true,
"provider": "fai"
}