curl --location --request DELETE '//api.postmarkapp.com//templates/' \
--header 'X-Postmark-Server-Token;'
{
"Active": true,
"Alias": "string",
"AssociatedServerId": 0,
"HtmlBody": "string",
"Name": "string",
"Subject": "string",
"TemplateID": 0,
"TextBody": "string"
}