EVENT_JSON:{"standard":"nep171","version":"1.0.0","event":"nft_transfer","data":[{"old_owner_id":"c31e23a94014c9a5f7b9b3f504c99e95c114c8cd1b3b4df272bf2fc5f0725727","new_owner_id":"2bccca7db233316149669709af844156875e0989c2a11bad03572749fdd6ad28","token_ids":["687"]}]}