{
  "type": "inboundPhoneCall",
  "costs": [
    null
  ],
  "messages": [
    null
  ],
  "phoneCallProvider": "twilio",
  "phoneCallTransport": "sip",
  "status": "scheduled",
  "endedReason": "call-start-error-neither-assistant-nor-server-set",
  "endedMessage": "example"
}