var obj = {
"MapName": "Adeyyo",
"JDVersion": 2019,
"OriginalJDVersion": 2019,
"Artist": "Ece Seçkin",
"Title": "Adeyyo",
"Credits": "Written by Aysen Şimşekyay, Kemal Şimşekyay and arranged by Ozan Doğulu. Published by DMC & PRM. Courtesy of DGL. All rights of the producer and other rightholders to the recorded work reserved. Unless otherwise authorized, the duplication, rental, loan, exchange or use of this video game for public performance, broadcasting and online distribution to the public are prohibited.",
"NumCoach": 1,
"BannerVideo": 0,
"CoachBeat": 1210,
"OnlineMap": 0,
"Tags": [
"main"
],
"PictogramBar": 1,
"PictoDuration": 3000,
"BeatDuration": 3000,
"LyricDuration": 1750,
"PictoResolutionX": 256,
"PictoResolutionY": 256,
"PictoResolutionUHD": 0,
"VideoType": "mp4",
"AudioType": "ogg",
"LyricColors": [111, 255, 182],
"LyricSpeed": 100,
"goldmoves": [166105, 226105],
"Difficulty": 1,
"DefaultColors": {
"lyrics": "0xFF6FFFB6",
"theme": "0xFFFFFFFF",
"songColor_1A": "0xFF010342",
"songColor_1B": "0xFF411554",
"songColor_2A": "0xFF97FAFC",
"songColor_2B": "0xFF11B7C6"
}
}
var value = 0;
for (let key in obj) {
if (key === "LyricDuration") value += obj[key]
}
// value === 1750
ТехноТекст 2020 
