curl --request POST \
  --url https://trytako.com/api/v1/threads/{thread_id}/messages \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "message": "<string>",
  "csv": "<string>",
  "file_sources": [
    {
      "file_id": "<string>",
      "file_context": "<string>"
    }
  ],
  "in_focus_card_id": "<string>"
}'

{
  "thread_id": "<string>",
  "message_id": "<string>",
  "created": 123,
  "object": "thread.message",
  "role": "<string>",
  "content": [
    {
      "type": "text",
      "text": "<string>"
    }
  ]
}