<methodCall>
    <methodName>InvoiceService.createBlankOrder</methodName>
    <params>
        <param>
            <value>
                <string>foo</string>
            </value>
        </param>
        <param>
            <value>
                <int>111</int>
            </value>
        </param>
        <param>
            <value>
                <string>hello world</string>
            </value>
        </param>
        <param>
            <value>
                <dateTime.iso8601>20140808T00:00:00</dateTime.iso8601>
            </value>
        </param>
        <param>
            <value>
                <int>2</int>
            </value>
        </param>
        <param>
            <value>
                <int>3</int>
            </value>
        </param>
    </params>
</methodCall>