curl --request PUT \
  --url https://sbx-{sandbox_id}-{workspace_id}.{region}.bl.run/filesystem/tree/{path} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "files": {
    "\"dir/file2.txt\"": "\"content2\"}",
    "{\"file1.txt\"": "\"content1\""
  }
}
'

{
  "files": [
    {
      "group": "<string>",
      "lastModified": "<string>",
      "name": "<string>",
      "owner": "<string>",
      "path": "<string>",
      "permissions": "<string>",
      "size": 123
    }
  ],
  "name": "<string>",
  "path": "<string>",
  "subdirectories": [
    {
      "name": "<string>",
      "path": "<string>"
    }
  ]
}