curl --location --request POST 'https://dev.your-api-server.com/files' \
--form 'purpose="fine-tune"' \
--form 'file=@""'
{
"id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
"object": "file",
"bytes": 12000,
"created_at": 1717491627,
"filename": "train.jsonl",
"purpose": "fine-tune"
}