curl --request POST \
  --url 'https://api.flashcat.cloud/template/preview?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "<string>",
  "type": "dingtalk_app",
  "incident_id": "<string>"
}
'

{
  "data": {
    "content": "<string>",
    "success": true,
    "message": "<string>"
  },
  "error": {}
}