这是我的请求参数，我按照文档核对好几次也没有发现那里不对，还请有经验的大神帮忙看下

{"code":"PARAM_ERROR","message":"请求参数错误"}

{
  "activity_base_info": {
    "activity_name": "测试支付有礼",
    "activity_second_title": "支付有礼活动",
    "merchant_logo_url": "http://mmbiz.qpic.cn/sz_mmbiz_png/BghEpvrN8vwaQiafc9teAC3ozNnkUnSnFy0OSyF9pnpRXsNjwI9ubYoyiaewRMuJDzwViaJjUialnGowtNw4TQS2VQ/0",
    "background_color": "Color020",
    "begin_time": "2020-08-17T13:29:35+08:00",
    "end_time": "2020-08-20T13:29:35+08:00",
    "out_request_no": "100002322019090134234sfdf",
    "delivery_purpose": "OFF_LINE_PAY"
  },
  "award_send_rule": {
    "transaction_amount_minimum": 100,
    "send_content": "SINGLE_COUPON",
    "award_type": "BUSIFAVOR",
    "award_list": [
      {
        "stock_id": "98065001",
        "original_image_url": "http://mmbiz.qpic.cn/sz_mmbiz_png/BghEpvrN8vwaQiafc9teAC3ozNnkUnSnFy0OSyF9pnpRXsNjwI9ubYoyiaewRMuJDzwViaJjUialnGowtNw4TQS2VQ/0"
      }
    ],
    "merchant_option": "MANUAL_INPUT_MERCHANT",
    "merchant_id_list": [
      "379100666"
    ]
  }
}