personalized-triggered-send-wsproxy.js

<script runat="server">       
var prox = new Script.Util.WSProxy();
var tsExKey = ''; //provide Triggered Send External Key
var EmailAddress = ''; //pass Email Address
var SubscriberKey = ''; //pass Subscriber Key
var firstName = ''; //pass First Name
var lastName = ''; //pass Last Name
var tsDef = {
    TriggeredSendDefinition: {
        CustomerKey: tsExKey
    },
    Subscribers: [{
        EmailAddress: EmailAddress,
        SubscriberKey: SubscriberKey,
        Attributes: [{
            Name: 'firstName',
            Value: firstName
        }]
    }]
};
var res = prox.createItem('TriggeredSend', tsDef);      
</script>