{"op":"auction.create","auction_id":"auc_0123456789abcdef","title":"rare widget #7","status":"open","close_round":30050000,"closes_at_utc":"2026-07-02T00:49:27Z","how_to_bid":{"1_seal":"timelock-encrypt your bid to round 30050000","2_submit":"POST the ciphertext to /auction/bid","fairness":"no bid is readable by anyone until the round lands"}}