curl --request POST \
  --url https://api.example.com/blobs \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'bucket=<string>' \
  --form blob='@example-file'

{
  "bucket": "<string>",
  "created_at": "<string>",
  "id": "<string>",
  "mime_type": "<string>",
  "size": 123
}