public function setFields($fields = [])
    {
        $existingSchema = $this->get();

        $request = [];
        foreach ($fields as $field) {
            $mode = $this->hasField($field['name'], $existingSchema) ? 'replace-field' : 'add-field';
            $request[$mode][] = $field;
        }

        return $this->request($request);
    }