curl --request POST \
  --url 'https://api.sandbox.stateset.app/api/v1/sandbox/{sandboxId}/files' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "files": [
    {
      "path": "string",
      "content": "string"
    }
  ]
}'

{
  "success": true,
  "files_written": 1
}