curl --request POST \
  --url https://api.chat-dash.com/v1/public/agents/{agentId}/conversations/{conversationId}/messages \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "messages": [
    {
      "sender": "user",
      "type": "text",
      "content": {
        "text": "<string>"
      },
      "metadata": {
        "model": "<string>",
        "total": 123
      },
      "createdAt": "<string>"
    }
  ]
}
'

{
  "message": "Messages added successfully"
}