{"id":"ch_1TVREw_u-FfhrdTY","nonce":"U4af99PQT75Haglt","twist":"head16","task":"Take the SHA-256 of the UTF-8 string \"U4af99PQT75Haglt\" as lowercase hex, then keep the first 16 characters. Send it back within 10 seconds.","expiresAt":"2026-10-03T19:04:32.936Z"}