global with sharing class CaseWebserviceClassTemp
{
    global class MyCaseInfo
    {
        webservice String Description;
        webservice Long textId = null;
    }

    //actual method to insert the Case into SFDC
    webservice static String createNewCasesTemp(CaseWebserviceClassTemp.MyCaseInfo caseInformation)
    {
        //logic goes here
        return null;
    }
}

<xsd:complexType name="MyCaseInfo">
    <xsd:sequence>
    <xsd:element name="Description" minOccurs="0" type="xsd:string" nillable="true"/>
    <xsd:element name="textId" minOccurs="0" type="xsd:long" nillable="true"/>
    </xsd:sequence>
</xsd:complexType>