It doesn't show me the Roadsign Gloves skin (roadsign.gloves).
If I add it manually, the skins do not appear,
Could it be because it has another name?
or have to add any reference that is not this?

help me mysticos !, thank you!

{
"Roadsign Gloves": "roadsign.gloves",
"Skins": [
0,
2394742340,
2411814825,
2490450568,
2422673007,
2394586981,
2396188734,
2419119121,
2401515914,
2461969758,
2440181986,
2434104276,
2463959891,
2464518406,
2466575692,
2483566191,
2510099481,
2504104481
]
},

Your config is invalid because it says "Roadsign Gloves" but it should be "Item Shortname" (just that, do NOT replace the "left" part, only the one after ":". So this is correct mostly. just replace Roadsign Gloves with Item Shortname.