Creating a Wire Transfer URL

{
    "transactionId": "2688A375-F644-4833-4456-8F1055250C5F",
    "operationId": 12,
    "status": 0,
    "message": "URL Transfer has been generated successfully.",
    "log": "",
    "errorCode": "",
    "order": {
        "reference": "123456789",
        "totalAmount": 10000,
        "dateTime": "1550496205"
    },
    "processor": {
        "Transfer": {
            "acquirer": "Ita\u00fa - Transf. entre contas",
            "acquirerId": 20,
            "amount": "10000",
            "urlTransfer": "https:\/\/evaluation-api.azpay.com.br\/v1\/itaushopline\/2688A375-F644-4833-4456-8F1055250C5F"
        }
    }
}

{
    "transactionId": null,
    "status": {
        "code": 409,
        "message": "ERROR - XML"
    },
    "result": {
        "error": {
            "code": 101,
            "action": "XML",
            "message": "XML ERROR",
            "details": "<![CDATA[Element 'merchantKey': [facet 'minLength'] The value has a length of '0'; this underruns the allowed minimum length of '10'.\n]]>",
            "moreInfo": "<![CDATA[Please check fields format and special character.]]>"
        }
    }
}