only add custom fields if previous key exists
only add custom fields if previous key exists

bitsuperlab/web_play,dacsunlimited/web_play,zhangweis/dice_web,bitshares/web_wallet,bitshares/web_wallet,dacsunlimited/web_play,dacsunlimited/web_play,bitsuperlab/web_play,bitsuperlab/web_play