{
  "method": "INVITE",
  "uri": "sip:vivekg@chair-dnrc.example.com;unknownparam",
  "version": "2.0",
  "headers": {
    "to": {
      "uri": "sip:vivekg@chair-dnrc.example.com",
      "params": {
        "tag": "1918181833n"
      }
    },
    "from": {
      "name": "\"J Rosenberg \\\\\\\"\"",
      "uri": "sip:jdrosen@example.com",
      "params": {
        "tag": "98asjd8"
      }
    },
    "max-forwards": "0068",
    "call-id": "wsinv.ndaksdj@192.0.2.1",
    "content-length": 150,
    "cseq": {
      "seq": 9,
      "method": "INVITE"
    },
    "via": [
      {
        "version": "2.0",
        "protocol": "UDP",
        "host": "192.0.2.2",
        "params": {
          "branch": "390skdjuw"
        }
      },
      {
        "version": "2.0",
        "protocol": "TCP",
        "host": "spindle.example.com",
        "params": {
          "branch": "z9hG4bK9ikj8"
        }
      },
      {
        "version": "2.0",
        "protocol": "UDP",
        "host": "192.168.255.111",
        "params": {
          "branch": "z9hG4bK30239"
        }
      }
    ],
    "subject": "",
    "newfangledheader": "newfangled value\r\n continued newfangled value",
    "unknownheaderwithunusualvalue": ";;,,;;,;",
    "content-type": "application/sdp",
    "route": [
      {
        "uri": {
          "schema": "sip",
          "host": "services.example.com",
          "port": null,
          "params": {
            "lr": null,
            "unknownwith": "value",
            "unknown-no-value": null
          },
          "headers": {}
        },
        "params": {}
      }
    ],
    "contact": [
      {
        "name": "\"Quoted string \\\"\\\"\"",
        "uri": "sip:jdrosen@example.com",
        "params": {
          "newparam": "newvalue",
          "secondparam": null,
          "q": "0.33"
        }
      }
    ]
  },
  "content": "v=0\r\no=mhandley 29739 7272939 IN IP4 192.0.2.3\r\ns=-\r\nc=IN IP4 192.0.2.4\r\nt=0 0\r\nm=audio 49217 RTP/AVP 0 12\r\nm=video 3227 RTP/AVP 31\r\na=rtpmap:31 LPC\r\n"
}