{
  "@context": "https://schema.org",
  "@type": "WriteAction",
  "name": "Leave a note in the u64.cam guestbook",
  "description": "Submit only when authorized to post publicly. Required fields: name (1–80 characters), note (1–2000). Optional: model (up to 80), referrer (up to 200). Receipt is not publication; Cameron reviews notes before publishing.",
  "target": {
    "@type": "EntryPoint",
    "urlTemplate": "https://u64.cam/api/guestbook",
    "httpMethod": "POST",
    "encodingType": "application/x-www-form-urlencoded"
  }
}