I had some issues getting this to work, don't forget to add lines for auth, cipher, etc. for you OpenVPN configuration. Perhaps those are obvious, but it wasn't to me.
"Auth": "SHA256",
"CompLZO": "adaptive",
"Cipher": "AES-256-CBC",
Lastly, the template is great, but I used the HTML ONC generator (https://github.com/CharlesErickT/oncgenerator/blob/master/index.html) to help me.