app 支付宝支付参数

哪位大神帮我看看 这参数 有啥问题
app_id=20210021026118201&biz_content=%7B%22out_trade_no%22%3A%220622021120902000124%22%2C%22total_amount%22%3A%228.00%22%2C%22subject%22%3A%22%5Cu6cd5%5Cu5f0f%5Cu590d%5Cu53e4chic%5Cu6c14%5Cu8d28%5Cu5c0f%5Cu4f17%5Cu4fa7%5Cu8fb9%5Cu4e0d%5Cu89c4%5Cu5219%5Cu82b1%5Cu8fb9%5Cu663e%5Cu7626%5Cu5a03%5Cu5a03%5Cu886b%5Cu4e0a%5Cu8863%5Cu77ed%5Cu8896%5Cu5973%22%7D&charset=utf-8&format=json&method=alipay.trade.app.pay&notify_url=http%3A%2F%2Fplease-to-set-default-host.com%2Fv1%2Fnotifies%2Falipay&sign=H%2B91e80BoEiyyTqO8Y%2BcafvucwyJTBOBx2yYgZiu6GKvH5Zj6CVcioSyCbSTCdxiw9%2BUP6evLBrEWdExFnXznAL%2BZ0GD7J5PKoCHZZsWXbtZzYKPoCE7XEEfQ%2FvOQ40DdUUjp2WyCR9DMwMy8AdxflA3sONXum4v1l7wOnjf4x6c7UP7p3ma4p%2BhzRDZcy3%2FrK%2BgYg%2FGBUWVY3zXnlC8VVgyqm7duH4QxqrTZbqDjODu3rr9VZacrMwUCP%2BXdlPirNS4DdvrWgt9V5cUTCMhVsNn7p3MvK9ss%2Bw4Awxk3nUETIAR88sQvP3iw8dvkFyvtD2H5byBprSDfJ4eoBW%2BUg%3D%3D&sign_type=RSA2&timestamp=2021-12-09%2017:17:03&version=1.0
有些参数 为了安全 被我 改动了 我想问问 传给app的参数 是 带百分号的吗 还缺什么参数吗？现在报 ‘商家订单参数异常，请重新发起付款’
谢谢~~