curl --request GET \
  --url https://api.hubapi.com/crm/v3/extensions/calling/transcripts/{transcriptId} \
  --header 'Authorization: Bearer <token>'

{
  "createdAt": "2023-11-07T05:31:56Z",
  "engagementId": 123,
  "id": "<string>",
  "transcriptSource": "HUBSPOT_GENERATED",
  "transcriptUtterances": [
    {
      "endTimeMillis": 123,
      "id": "<string>",
      "startTimeMillis": 123,
      "text": "<string>",
      "languageCode": "<string>"
    }
  ],
  "updatedAt": "2023-11-07T05:31:56Z"
}