v=0
o=-  16833 0 IN IP4 0.0.0.0
s=-
t=0 0
a=group:BUNDLE audio
a=ice-options:trickle
m=audio 49203 UDP/TLS/RTP/SAVPF 109 0 8
c=IN IP4 203.0.113.77
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:c300d85b
a=ice-pwd:de4e99bd291c325921d5d47efbabd9a2
a=fingerprint:sha-256 6B:8B:F0:65:5F:78:E2:51:3B:AC:6F:F3:3F:46:1B:35:DC:B8:5F:64:1A:24:C2:43:F0:A1:58:D0:A1:2C:19:08 
a=setup:active
a=tls-id:CJ6FF9ZZMJW7MDRJIR7XVIQM48GE1G31
a=rtcp-mux
a=rtcp-rsize
a=rtcp-fb:* nack
a=extmap:1/sendonly urn:ietf:params:rtp-hdrext:csrc-audio-level
a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:mid
a=candidate:0 1 UDP 2113667327 198.51.100.7 51556 typ host
a=candidate:1 1 UDP 1694302207 203.0.113.77 49203 typ srflx raddr 198.51.100.7 rport 51556
a=end-of-candidates