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

{
  "NetworkConfigurations": [
    {
      "GUID": "{485d6076-dd44-6b6d-69787465725f5045}",
      "Type": "WiFi",
      "Name": "My WiFi Network",
      "WiFi": {
        "Passphrase": "z123456789012",
        "SSID": "ssid",
        "Security": "WEP-PSK"
      },
      "ProxySettings": {
        "Type": "Manual",
        "Manual": {
          "HTTPProxy" : {
            "Host" : "http.example.com",
            "Port" : 1234
          },
          "SecureHTTPProxy" : {
            "Host" : "https.example.com",
            "Port" : 3456
          },
          "FTPProxy" : {
            "Host" : "ftp.example.com",
            "Port" : 5678
          },
          "SOCKS" : {
            "Host" : "socks5://socks.example.com",
            "Port" : 7890
          }
        },
        "ExcludeDomains": [
          "<local>",
          "google.com"
        ]
      }
    }
  ],
  "Certificates": [],
  "Type": "UnencryptedConfiguration"
}