curl --request GET \
  --url https://sbx-{sandbox_id}-{workspace_id}.{region}.bl.run/filesystem-multipart \
  --header 'Authorization: Bearer <token>'

{
  "uploads": [
    {
      "initiatedAt": "<string>",
      "parts": {},
      "path": "/tmp/largefile.dat",
      "permissions": 420,
      "uploadId": "550e8400-e29b-41d4-a716-446655440000"
    }
  ]
}