return empty object on all handlers instead of empty string

management/server/http/groups_handler.go

@@ -300,7 +300,7 @@ func (h *GroupsHandler) DeleteGroup(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // GetGroup returns a group

management/server/http/handler.go

@@ -25,6 +25,9 @@ type apiHandler struct {
 	AuthCfg        AuthCfg
 }
 
+type emptyObject struct {
+}
+
 // APIHandler creates the Management service HTTP API handler registering all the available endpoints.
 func APIHandler(accountManager s.AccountManager, appMetrics telemetry.AppMetrics, authCfg AuthCfg) (http.Handler, error) {
 	jwtMiddleware, err := middleware.NewJwtMiddleware(

management/server/http/nameservers_handler.go

@@ -243,7 +243,7 @@ func (h *NameserversHandler) DeleteNameserverGroup(w http.ResponseWriter, r *htt
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // GetNameserverGroup handles a nameserver group Get request identified by ID

management/server/http/pat_handler.go

@@ -184,7 +184,7 @@ func (h *PATHandler) DeleteToken(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 func toPATResponse(pat *server.PersonalAccessToken) *api.PersonalAccessToken {

management/server/http/peers_handler.go

@@ -66,7 +66,7 @@ func (h *PeersHandler) deletePeer(accountID, userID string, peerID string, w htt
 		util.WriteError(err, w)
 		return
 	}
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // HandlePeer handles all peer requests for GET, PUT and DELETE operations

management/server/http/policies.go

@@ -225,7 +225,7 @@ func (h *Policies) DeletePolicy(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // GetPolicy handles a group Get request identified by ID

management/server/http/routes_handler.go

@@ -321,7 +321,7 @@ func (h *RoutesHandler) DeleteRoute(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // GetRoute handles a route Get request identified by ID

management/server/http/rules_handler.go

@@ -222,7 +222,7 @@ func (h *RulesHandler) DeleteRule(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	util.WriteJSONObject(w, "")
+	util.WriteJSONObject(w, emptyObject{})
 }
 
 // GetRule handles a group Get request identified by ID