@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TracksHaveHashtags that = (TracksHaveHashtags) o;

        if (hashtagId != that.hashtagId) return false;
        if (trackId != that.trackId) return false;

        return true;
    }