diff --git a/model/model.go b/model/model.go
index 6497c77..2401b2c 100644
--- a/model/model.go
+++ b/model/model.go
@@ -121,6 +121,7 @@ type Playlist struct {
 
 type PlaylistItem struct {
 	ID         int `gorm:"primary_key"`
+	CreatedAt  time.Time
 	Playlist   Playlist
 	PlaylistID int `sql:"default: null; type:int REFERENCES playlists(id) ON DELETE CASCADE"`
 	Track      Track
diff --git a/server/ctrlsubsonic/handlers_common.go b/server/ctrlsubsonic/handlers_common.go
index 4665bdc..028f24a 100644
--- a/server/ctrlsubsonic/handlers_common.go
+++ b/server/ctrlsubsonic/handlers_common.go
@@ -156,6 +156,7 @@ func (c *Controller) ServeGetPlaylist(r *http.Request) *spec.Response {
 		`).
 		Where("playlist_items.playlist_id = ?", playlistID).
 		Group("tracks.id").
+		Order("playlist_items.created_at").
 		Preload("Album").
 		Find(&tracks)
 	user := r.Context().Value(key.User).(*model.User)
@@ -169,38 +170,56 @@ func (c *Controller) ServeGetPlaylist(r *http.Request) *spec.Response {
 	return sub
 }
 
-func (c *Controller) ServeCreatePlaylist(r *http.Request) *spec.Response {
-	user := r.Context().Value(key.User).(*model.User)
+func (c *Controller) ServeUpdatePlaylist(r *http.Request) *spec.Response {
+	playlistID, _ := parsing.GetFirstIntParamOf(r, "id", "playlistId")
+	//
+	// begin updating meta
 	playlist := &model.Playlist{}
 	c.DB.
-		Select("id").
-		Where("id = ?", parsing.GetIntParamOr(r, "id", 0)).
+		Where("id = ?", playlistID).
 		First(playlist)
+	user := r.Context().Value(key.User).(*model.User)
 	playlist.UserID = user.ID
-	playlist.Name = parsing.GetStrParam(r, "name")
+	if name := parsing.GetStrParam(r, "name"); name != "" {
+		playlist.Name = name
+	}
+	if comment := parsing.GetStrParam(r, "comment"); comment != "" {
+		playlist.Comment = comment
+	}
 	c.DB.Save(playlist)
-	sub := spec.NewResponse()
-	tracks, ok := r.URL.Query()["songId"]
-	if !ok {
-		return sub
-	}
-	for _, trackIDStr := range tracks {
-		trackID, err := strconv.Atoi(trackIDStr)
-		if err != nil {
-			continue
+	//
+	// begin delete tracks
+	if indexes, ok := r.URL.Query()["songIndexToRemove"]; ok {
+		trackIDs := []int{}
+		c.DB.
+			Order("created_at").
+			Model(&model.PlaylistItem{}).
+			Where("playlist_id = ?", playlistID).
+			Pluck("track_id", &trackIDs)
+		for _, indexStr := range indexes {
+			i, err := strconv.Atoi(indexStr)
+			if err != nil {
+				continue
+			}
+			c.DB.Delete(&model.PlaylistItem{},
+				"track_id = ?", trackIDs[i])
 		}
-		c.DB.Save(&model.PlaylistItem{
-			PlaylistID: playlist.ID,
-			TrackID:    trackID,
-		})
 	}
-	return sub
-}
-
-func (c *Controller) ServeUpdatePlaylist(r *http.Request) *spec.Response {
-	// user := r.Context().Value(key.User).(*model.User)
-	sub := spec.NewResponse()
-	return sub
+	//
+	// begin add tracks
+	if toAdd := parsing.GetFirstParamOf(r, "songId", "songIdToAdd"); toAdd != nil {
+		for _, trackIDStr := range toAdd {
+			trackID, err := strconv.Atoi(trackIDStr)
+			if err != nil {
+				continue
+			}
+			c.DB.Save(&model.PlaylistItem{
+				PlaylistID: playlist.ID,
+				TrackID:    trackID,
+			})
+		}
+	}
+	return spec.NewResponse()
 }
 
 func (c *Controller) ServeDeletePlaylist(r *http.Request) *spec.Response {
diff --git a/server/ctrlsubsonic/spec/construct.go b/server/ctrlsubsonic/spec/construct.go
index 9850158..70d8d46 100644
--- a/server/ctrlsubsonic/spec/construct.go
+++ b/server/ctrlsubsonic/spec/construct.go
@@ -4,8 +4,10 @@ import "senan.xyz/g/gonic/model"
 
 func NewPlaylist(p *model.Playlist) *Playlist {
 	return &Playlist{
-		ID:      p.ID,
-		Name:    p.Name,
-		Comment: p.Comment,
+		ID:       p.ID,
+		Name:     p.Name,
+		Comment:  p.Comment,
+		Duration: "1",
+		Public:   true,
 	}
 }
diff --git a/server/ctrlsubsonic/spec/spec.go b/server/ctrlsubsonic/spec/spec.go
index 1bce3d7..eb66ce7 100644
--- a/server/ctrlsubsonic/spec/spec.go
+++ b/server/ctrlsubsonic/spec/spec.go
@@ -210,5 +210,7 @@ type Playlist struct {
 	Owner     string        `xml:"owner,attr"     json:"owner,omitempty"`
 	SongCount string        `xml:"songCount,attr" json:"songCount,omitempty"`
 	Created   string        `xml:"created,attr"   json:"created,omitempty"`
+	Duration  string        `xml:"duration,attr"  json:"duration,omitempty"`
+	Public    bool          `xml:"public,attr"    json:"public,omitempty"`
 	List      []*TrackChild `xml:"entry"          json:"entry,omitempty"`
 }
diff --git a/server/parsing/parsing.go b/server/parsing/parsing.go
index 83ae906..3f2438a 100644
--- a/server/parsing/parsing.go
+++ b/server/parsing/parsing.go
@@ -37,3 +37,21 @@ func GetIntParamOr(r *http.Request, key string, or int) int {
 	}
 	return val
 }
+
+func GetFirstParamOf(r *http.Request, keys ...string) []string {
+	for _, key := range keys {
+		if val, ok := r.URL.Query()[key]; ok {
+			return val
+		}
+	}
+	return nil
+}
+
+func GetFirstIntParamOf(r *http.Request, keys ...string) (int, bool) {
+	for _, key := range keys {
+		if v, err := GetIntParam(r, key); err == nil {
+			return v, true
+		}
+	}
+	return 0, false
+}
diff --git a/server/server.go b/server/server.go
index 57b8332..7a58511 100644
--- a/server/server.go
+++ b/server/server.go
@@ -128,7 +128,7 @@ func (s *Server) SetupSubsonic() error {
 	rout.Handle("/getUser{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetUser))
 	rout.Handle("/getPlaylists{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetPlaylists))
 	rout.Handle("/getPlaylist{_:(?:\\.view)?}", ctrl.H(ctrl.ServeGetPlaylist))
-	rout.Handle("/createPlaylist{_:(?:\\.view)?}", ctrl.H(ctrl.ServeCreatePlaylist))
+	rout.Handle("/createPlaylist{_:(?:\\.view)?}", ctrl.H(ctrl.ServeUpdatePlaylist))
 	rout.Handle("/updatePlaylist{_:(?:\\.view)?}", ctrl.H(ctrl.ServeUpdatePlaylist))
 	rout.Handle("/deletePlaylist{_:(?:\\.view)?}", ctrl.H(ctrl.ServeDeletePlaylist))
 	//