Notify HTTP target - Tags are being posted instead of values in the target

Hi,

While I setup "Notify Target" trigger for an HTTP target and add the message in JSON format regarding which ticket fields data to be sent, Zendesk sends tags instead of values. Can you help me sending the field values rather than tags? Below code for your quick reference:

{
"username": "xxxxxxxxxxxxxxx",
"password": "xxxxxxxxxxxxxxx",
"CallData": {
"Calls":
{
"ShortDescription": "{{ticket.title}}",
"Description": "{{ticket.description}}",
"SysSpecField2": "{{ticket.id}}",
"Caller":
{
"Description": "string"
},
"CCP":
{
"Description": "{{ticket.ticket_field_1500001829881}}"
},
"MainComp":
{
"SerNr": "{{ticket.ticket_field_1500001843462}}",
"OpSys": "INCIDENT"
}
},

"ExtTableValues": {
"Field103": "{{ticket.requester.email}}",
"Field89": "{{ticket.ticket_field_360056903194}}",
"Field88": "{{ticket.ticket_field_360056903174}}",

}
}
}