curl -X POST 'https://api.sendforsign.com/api/template' \
     -H 'X-Sendforsign-Key: YOUR_API_KEY' \
     -H 'Content-Type: application/json' \
     -d '{
    "data": {
        "action": "duplicate",
        "clientKey": "YOUR_CLIENT_KEY",
        "template": {
            "templateKey": "YOUR_TEMPLATE_KEY"
        }
    }
}'

{
    "template": {
        "createTime": "2023-12-01 12:18:55",
        "templateKey": "NEW_TEMPLATE_KEY"
    },
    "code": "201",
    "message": "Template duplicated"
}