send-0019

[xehpuk]

See #69.

{
    "Messages": [
        {
            "Status": "error",
            "Errors": [
                {
                    "ErrorIdentifier": "aac3a819-bff9-48f1-8eb5-0f3a52089309",
                    "ErrorCode": "send-0019",
                    "StatusCode": 400,
                    "ErrorMessage": "Wrong type for template header, expected type \"string\"",
                    "ErrorRelatedTo": [
                        "sender"
                    ]
                }
            ]
        }
    ]
}