{
  "method": "OPTIONS",
  "uri": "sip:user@example.com",
  "version": "2.0",
  "headers": {
    "to": {
      "uri": "sip:user@example.com",
      "params": {}
    },
    "from": {
      "name": "caller",
      "uri": "sip:caller@example.com",
      "params": {
        "tag": "323"
      }
    },
    "max-forwards": "70",
    "call-id": "lwsdisp.1234abcd@funky.example.com",
    "cseq": {
      "seq": 60,
      "method": "OPTIONS"
    },
    "via": [
      {
        "version": "2.0",
        "protocol": "UDP",
        "host": "funky.example.com",
        "params": {
          "branch": "z9hG4bKkdjuw"
        }
      }
    ],
    "content-length": 0
  },
  "content": ""
}