var (
		url    = "http://test.com/rpc/user"
		method = "test-rpc"
		params = map[string]interface{}{
			"param1": 1,
		}
	)
	jsonClient := &JsonRpcClient{}
	result, err := jsonClient.Call(context.Background(), url, method, params)
	if err != nil {
		fmt.Println("jsonrpc request error:", err.Error())
		return
	}
	if result.Error != nil {
		fmt.Println("jsonrpc result error:", result.Error)
		return
	}
	if result.Result == nil {
		fmt.Println("jsonrpc result error: result is nil")
		return
	}
	t.Log("jsonrpc success:", result.Result)