curl --request POST \
  --url https://api.recoupable.com/api/sandboxes/files \
  --header 'Content-Type: application/json' \
  --data '
{
  "files": [
    {
      "url": "https://example.com/files/album-cover.png",
      "name": "album-cover.png"
    }
  ],
  "path": "assets/images",
  "message": "Add new album artwork"
}
'

{
  "status": "success",
  "uploaded": [
    {
      "path": "<string>",
      "sha": "<string>"
    }
  ]
}