调用即时配送的预下配送单接口报错? resultcode:2004

已设置顺丰账号，调用即时配送的预下配送单接口的返回结果，请问是顺丰同城配送方的问题吗？

{
deliverfee: 0
delivery_token: ""
dispatch_duration: 0
distance: 0
fee: 0
insurancefee: 0
resultcode: 2004
resultmsg: "微信接口验证签名失败"
tips: 0
}