         (offset (* spotify-api-search-limit (1- page))))
     (spotify-api-call
      "GET"
-     (format "/users/%s/playlists/%s/tracks?limit=%d&offset=%d&market=from_token"
-             owner id spotify-api-search-limit offset))))
+     (concat (format "/users/%s/playlists/%s/tracks?"
+                     (url-hexify-string owner)
+                     (url-hexify-string id)  offset)
+             (url-build-query-string `((limit  ,spotify-api-search-limit)
+                                       (offset ,offset)
+                                       (market from_token)))))))
 
 (defun spotify-popularity-bar (popularity)
   "Returns the popularity indicator bar proportional to the given parameter,

            (id (spotify-get-item-id playlist)))
        (spotify-api-call
         "DELETE"
         (format "/users/%s/playlists/%s/followers" owner id)))
    (end-of-file t)))

(defun spotify-api-playlist-tracks (playlist page)

            (id (spotify-get-item-id playlist)))
        (spotify-api-call
         "PUT"
         (format "/users/%s/playlists/%s/followers"
                 (url-hexify-string owner)
                 (url-hexify-string id))))
    (end-of-file t)))

(defun spotify-api-playlist-unfollow (playlist)
