curl --request POST \
  --url https://services.leadconnectorhq.com/calendars/appointments/{appointmentId}/notes \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Version: <version>' \
  --data '
{
  "body": "lorem ipsum",
  "userId": "GCs5KuzPqTls7vWclkEV"
}
'

{
  "note": {
    "id": "HGPcayliwcdoUFzvbTok",
    "body": "lorem ipsum",
    "userId": "TUcmRxWrjqzJS8EjkxNK",
    "dateAdded": "2021-07-08T12:02:11.285Z",
    "contactId": "TUcmRxWrjqzJS8EjkxNK",
    "createdBy": {
      "id": "TUcmRxWr",
      "name": "John Doe"
    }
  }
}