public function createFavorites($id, $entities = null)
	{
		// Set the API path.
		$path = '/favorites/create.json';

		$data['id'] = $id;

		// Check if entities is specified.
		if (!is_null($entities))
		{
			$data['include_entities'] = $entities;
		}

		// Send the request.
		return $this->sendRequest($path, 'POST', $data);
	}