curl --request POST \
  --url https://api-west.millis.ai/webrtc/offer \
  --header 'Content-Type: application/json' \
  --header 'authorization: <authorization>' \
  --data '{
  "offer": {
    "sdp": "<string>",
    "type": "<string>"
  },
  "agent_id": "<string>"
}'

{
  "answer": {
    "sdp": "<string>",
    "type": "<string>"
  }
}