{ "GUID": "guid",
  "Type": "vpn",
  "Name": "MyL2TPVPN",
  "Provider.Host": "some.host.org",
  "Provider.Type": "l2tpipsec",
  "L2TPIPsec.PSK": "some_preshared_key",
  "L2TPIPsec.User": "some username",
  "L2TPIPsec.Password": "some password",
  "SaveCredentials": true
}