export class Album {
  constructor(
    public id: number,
    public name: string,
    public url: string,
    public photoscount: number
  ) {}
}

export class AlbumComponent implements OnInit {
  album: Album;
  constructor(private appService: AppService, private route: ActivatedRoute) {}

  ngOnInit() {
    this.appService
      .getAlbum(this.route.snapshot.paramMap.get("url"))
      .subscribe((album: Album) => {
        this.album = album;
      });
  }
}

<h4>{{album.name}}</h4>