chromium/chromeos/components/test/data/onc/wifi_eap_ttls.onc

{
  "GUID": "{77db0089-0bc8-4358-929c-123xcv}",
  "Type": "WiFi",
  "Name": "WifiEapTtls",
  "WiFi": {
    "Security": "WPA-EAP",
    "EAP": {
      "Outer": "EAP-TTLS",
      "Inner": "MSCHAPv2",
      "Identity": "my_identity",
      "UseSystemCAs": true,
      "ClientCertType": "Ref",
      "ClientCertRef": "{58ac1967-a0e7-49e9-be68-123abc}",
      "SaveCredentials": true
    }
  },
}