EVENT_JSON:{"standard":"nep171","version":"1.0.0","event":"nft_transfer","data":[{"authorized_id":"marketplace.paras.near","old_owner_id":"brendaa.near","new_owner_id":"xiaohao.near","token_ids":["73"]}]}
{"type":"resolve_purchase","params":{"owner_id":"brendaa.near","nft_contract_id":"mara-smartcontract.near","token_id":"73","ft_token_id":"near","price":"50000000000000000000000000","buyer_id":"xiaohao.near"}}