public function set($key, $value, $forClientId = null)
	{
		$params = array('key' => $key, 'value' => $value);
		if (is_array($value)) {
			$params['value'] = json_encode($value);
		}

		if ($forClientId) {
			$params['for_client_id'] = $forClientId;
		}

		return $this->post('settings/set', $params);
	}