curl --request POST \
  --url https://app.harmonica.chat/api/v1/sessions/{id}/chat \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "<string>",
  "participant_id": "<string>",
  "participant_name": "<string>"
}
'

{
  "message": {
    "role": "assistant",
    "content": "<string>",
    "is_final": true
  },
  "thread_id": "<string>"
}