public function get_data_hash() {
		$meta = array(
			'file',
			'keywords',
			'location',
			'start',
			'end',
			'radius',
			'source',
			'content_type',
		);

		$data = array(
			'type' => $this->type,
			'origin' => $this->origin,
			'frequency' => null,
		);

		// If schedule Record, we need it's frequency
		if ( $this->is_schedule ) {
			$data['frequency'] = $this->frequency->id;
		}

		foreach ( $meta as $meta_key ) {
			if ( ! isset( $this->meta[ $meta_key ] ) ) {
				continue;
			}

			$data[ $meta_key ] = $this->meta[ $meta_key ];
		}

		// Remove the empty Keys
		$data = array_filter( $data );

		// Sort to avoid any weird MD5 stuff
		ksort( $data );

		// Create a string to be able to MD5
		$data_string = maybe_serialize( $data );

		return md5( $data_string );
	}