discount:
payment_type:
subject:
trade_no:
buyer_email:
gmt_create:
notify_type:
quantity:
out_trade_no:
seller_id:
notify_time:
body:
trade_status:
is_total_fee_adjust:
total_fee:
gmt_payment:
seller_email:
price:
buyer_id:
notify_id:
use_coupon:
sign_type:
sign:
ok