Minecraft forge mod does not work?

I started programming minecraft mods and created a crafting recipe. The recipe doesn't work for me but the game is running:

{
"type": "minecraft: crafting_shaped",
"pattern": [
"NNN",
"AAA",
"ZZZ"
],
"key": {
"N": {
"item": "minecraft: iron_block"
},
"A: {
"item": "minecraft: iron_ingot"
},
"Z": {
"item": "minecraft: gold_ingot"
}
},
"result": {
"item": "minecraft: stone",
"data": 0
}
}

I have no idea about the mods. But I see a syntax error.

You forgot a "after the A".

Thank you