public function toArray()
    {
        $json            = [];
        $json['jsonrpc'] = $this->jsonrpc;

        if ($this->method) {
            $json['method'] = $this->method;
        }

        $json['method'] = $this->method;

        if ($this->params) {
            $json['params'] = $this->params;
        }

        if ($this->id) {
            $json['id'] = $this->id;
        }

        return $json;
    }