curl --request POST \
  --url https://agentchat-api.fly.dev/v1/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "client_msg_id": "<string>",
  "content": {
    "text": "<string>",
    "data": {},
    "attachment_id": "<string>"
  },
  "to": "<string>",
  "conversation_id": "<string>",
  "type": "text",
  "metadata": {}
}
'

{
  "id": "<string>",
  "conversation_id": "<string>",
  "sender": "<string>",
  "client_msg_id": "<string>",
  "seq": 1,
  "type": "text",
  "content": {
    "text": "<string>",
    "data": {},
    "attachment_id": "<string>"
  },
  "status": "stored",
  "created_at": "2023-11-07T05:31:56Z",
  "delivered_at": "2023-11-07T05:31:56Z",
  "read_at": "2023-11-07T05:31:56Z",
  "metadata": {}
}