投放：成功,/n/r详细：
{
"return_code":"SUCCESS","return_msg":"",
"appid":"wxc72aa7912f3c5715",
"mch_id":"1557478971",
"device_info":"",
"nonce_str":"f8d6994ea9264bc1a120b3d1785a2d6f",
"result_code":"SUCCESS",
"err_code":null,
"err_code_des":null,
"coupon_stock_id":"16328101",
"resp_count":"1",
"success_count":"1",
"failed_count":"0",
"openid":"ooBJOuI3DbDnTMl_LVvzS4Cf4I94",
"ret_code":"SUCCESS",
"ret_msg":null,
"partner_trade_no":"15574789710924431000000000"}