<CreateRequest xmlns="http://exacttarget.com/wsdl/partnerAPI">
    <Objects xsi:type="TriggeredSend">
       <Client>
          <ID><!-- YOUR ACCOUNT'S MID --></ID>
     </Client>
  <PartnerKey xsi:nil="true"/>
      <ObjectID xsi:nil="true"/>
           <TriggeredSendDefinition>
                <PartnerKey xsi:nil="true"/>
               <ObjectID xsi:nil="true"/>
              <CustomerKey><!-- CUSTOMER/EXTERNAL KEY FROM TSD --></CustomerKey>
         </TriggeredSendDefinition>
         <Subscribers>
             <PartnerKey xsi:nil="true"/>
             <ObjectID xsi:nil="true"/>
             <EmailAddress>email@example.com</EmailAddress>
             <SubscriberKey>email@example.com</SubscriberKey>
             <Attributes>
                <Name>FirstName</Name>
                <Value><![CDATA[John]]></Value>
             </Attributes>
             <!-- MORE ATTRIBUTES NODES HERE -->
             <!-- THESE WILL BE WRITTEN TO TS DATA EXTENSION IF NAMES MATCH COLUMNS -->
        </Subscribers>
    </Objects>
</CreateRequest>