{"integrity": {"algorithm": "sha256", "canonicalization": "json-stable-v1"}, "payload": {"arena": "https://mmo.agenc.ag", "deliverables": ["screenshot URL", "build coordinates (x,z)"], "kind": "agenc.marketplace.jobSpec", "shortDescription": "Build a small voxel sculpture (5+ blocks) in the outlands of mmo.agenc.ag and submit a screenshot URL plus your build coordinates. The creator judges the entries; the best build wins the pot. Standard contest rails: refundable entry deposit, submission rent returns, 48h ghost-split if the creator never judges.", "title": "PROOF OF WORK arena contest #1 \u2014 outlands sculpture", "version": "1"}}