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Redux Javascript update state with multiple nested levels - immutable

The only solution I found is having this in the return statement of the reducer

return {
  ...state
  ,[topic_id]:{
    ...state[topic_id]
    ,matches:[
      ...state[topic_id].matches
      ,subticket
    ]
  }
}
;

If there are other solutions, let me know please.

The state structure looks like this

{"type":"main_options","images_arr":"'#ffffff'","enable_ajax":"off","soundcloud_apikey":"","bg_isparallax":"off","bg_slideshow_time":"0","bg_transition":"slidedown","site_url":"http:\/\/digitalzoomstudio.net","theme_url":"http:\/\/digitalzoomstudio.net\/wp-content\/themes\/qucreative\/","blur_ammount":"26","width_column":"50","width_section_bg":"","width_gap":"30","border_width":"0","border_color":"#ffffff","translate_cancel_comment":"Cancel reply","translate_leave_a_comment":"Leave a comment","translate_leave_a_comment_to":"Leave a comment to","is_customize_preview":"off","width_blur_margin":"30","gallery_w_thumbs_autoplay_videos":"off","enable_native_scrollbar":"on","content_enviroment_opacity":"30","menu_enviroment_opacity":"70"}
{"type":"darkfull"}