HarmonyOS 可信地理位置，服务端验签失败

console.log("location 签名后的数据", JSON.stringify(this.secureLocationData))
console.log('location latitude 维度==>' + secureLocation['originalLocation'].latitude.toFixed(15))
console.log('location longitude 经度==>' + secureLocation['originalLocation'].longitude.toFixed(15))
console.log('location altitude 高度==>' + secureLocation['originalLocation'].altitude.toFixed(15))
console.log('location accuracy 精确度==>' + secureLocation['originalLocation'].accuracy.toFixed(6))
console.log('location timeStamp 时间戳==>' + secureLocation['originalLocation'].timeStamp + "==" + timeStamp)
console.log('location userData 用户数据==>' + secureLocation['userData'])

this.secureLocationData = (secureLocation['originalLocation'].latitude.toFixed(15)) + ","
  + (secureLocation['originalLocation'].longitude.toFixed(15)) + ","
  + (secureLocation['originalLocation'].altitude.toFixed(15)) + ","
  + (secureLocation['originalLocation'].accuracy.toFixed(6)) + ","
  + timeStamp + ","
  + secureLocation['userData']
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使用上面的写法，对于小数点要精确