v=0
o=- 20518 0 IN IP4 0.0.0.0
s=-
t=0 0
a=group:BUNDLE audio
a=ice-options:trickle
m=audio 54609 UDP/TLS/RTP/SAVPF 109 0 8
c=IN IP4 203.0.113.141
a=mid:audio
a=msid:ma ta 
a=sendrecv
a=rtpmap:109 opus/48000/2
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=maxptime:120
a=ice-ufrag:074c6550
a=ice-pwd:a28a397a4c3f31747d1ee3474af08a068
a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2 
a=setup:actpass
a=tls-id:89J2LRATQ3ULA24G9AHWVR31VJWSLB68
a=rtcp-mux
a=rtcp-rsize
a=rtcp-fb:* nack
a=extmap:1/recvonly urn:ietf:params:rtp-hdrext:csrc-audio-level
a=extmap:2 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:3 urn:ietf:params:rtp-hdrext:sdes:mid
a=candidate:0 1 UDP 2113667327 192.0.2.4 61665 typ host
a=candidate:1 1 UDP 694302207 203.0.113.141 54609 typ srflx raddr 192.0.2.4 rport 61665
a=end-of-candidates