curl --request POST \
  --url https://api.x.com/2/dm_conversations/{dm_conversation_id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "<string>",
  "attachments": [
    {
      "media_id": "1146654567674912769"
    }
  ]
}
'

{
  "data": {
    "dm_conversation_id": "123123123-456456456",
    "dm_event_id": "1146654567674912769"
  },
  "errors": [
    {
      "title": "<string>",
      "type": "<string>",
      "detail": "<string>",
      "status": 123
    }
  ]
}