Fixed bug

cmd/sidecar/did.go

 package main
 
 import (
-	"encoding/json"
 	"fmt"
 	"io/ioutil"
 
@@ -13,6 +12,7 @@ import (
 	rpcx "gitlab.33.cn/link33/sidecar/hub/client"
 	"gitlab.33.cn/link33/sidecar/internal/repo"
 	"gitlab.33.cn/link33/sidecar/model/constant"
+	"gitlab.33.cn/link33/sidecar/pkg/json"
 )
 
 const (