Laravel.io
{
	"data": {
		"id": "string",
		"type": "e_invoices",
		"attributes": {
			"vat_withholding_code": "650",
			"vat_exemption_reason_code": null,
			"vat_exemption_reason": null,
			"note": "",
			"excise_duty_codes": [{
				"product": 4279051,
				"sales_excise_duty_code": 57
			}],
			"scenario": "basic",
			"to": "urn:mail:defaultpk@hakansoftware.com"
		},
		"relationships": {
			"invoice": {
				"data": {
					"id": "5135411",
					"type": "sales_invoices"
				}
			}
		}
	}
}

Please note that all pasted data is publicly available.