curl -X PATCH https://your-worker.workers.dev/api/threads/550e8400-e29b-41d4-a716-446655440000 \ -H "Content-Type: application/json" \ -d '{ "metadata": { "title": "Updated Title", "customField": "value" } }'
{ "success": true, "metadata": { "title": "Updated Title", "customField": "value" } }