how to add skins in json file cause i did 12 skins for ak but it shows me allone 4 so help how do i add skins here? 
{
"ChatCommand": "skin",
"PreventDefaultSkins": false,
"Workshop": {
"hoodie": [
903007754,
836974387
],
"metal.facemask": [
797057355
],
"metal.plate.torso": [
797887894
],
"pants": [
817830163
]
}
}

Just as shown in the example:
"hoodie": [ 903007754, 836974387 ],

^this would add the 2 skins via ids to the item hoodie
To make it easier just go via his commands:
skin.add itemShortname skinId

but then i can only add 4 skins and then it stops adding
i cant add more then 4 skins
i added 12 ak's but when i checked oly the first four where added

@bazz released Skins update :)