{
  "method": "OPTIONS",
  "uri": "sip:user;par=u%40example.net@example.com",
  "version": "2.0",
  "headers": {
    "to": {
      "uri": "sip:j_user@example.com",
      "params": {}
    },
    "from": {
      "uri": "sip:caller@example.org",
      "params": {
        "tag": "33242"
      }
    },
    "max-forwards": "3",
    "call-id": "semiuri.0ha0isndaksdj",
    "cseq": {
      "seq": 8,
      "method": "OPTIONS"
    },
    "accept": "application/sdp, application/pkcs7-mime,\r\n        multipart/mixed, multipart/signed,\r\n        message/sip, message/sipfrag",
    "via": [
      {
        "version": "2.0",
        "protocol": "UDP",
        "host": "192.0.2.1",
        "params": {
          "branch": "z9hG4bKkdjuw"
        }
      }
    ],
    "content-length": 0
  },
  "content": ""
}