{
"sid": "string",
"status": {
"code": "proforma",
"name": "string"
},
"billingNumber": "string",
"currency": null,
"issueDate": "2019-08-24",
"saleDate": "string",
"dueDate": "2019-08-24",
"buyer": {
"sid": "string",
"name": "string",
"": "string"
},
"seller": {
"sid": "string",
"name": "string"
},
"subtotalAmount": null,
"paymentFeeAmount": null,
"taxAmount": null,
"totalAmount": null,
"pdf": {
"url": "http://example.com"
},
"createdBy": "string",
"updatedBy": "string",
"createdAt": "2019-08-24T14:15:22.123Z",
"updatedAt": "2019-08-24T14:15:22.123Z",
"sentAt": "2019-08-24T14:15:22.123Z"
}