{
  "type": "minecraft:block",
  "pools": [{
    "rolls": 1,
    "entries": [{
        "type": "minecraft:alternatives",
        "children": [{
             "type": "minecraft:item",
             "conditions": [{
                   "condition": "minecraft:match_tool",
                   "predicate": {
                   "enchantments": [{
                           "enchantment": "minecraft:silk_touch",
                           "levels": {
                           "min": 1
                           }
                    }]
                    }
            }],
    "name": "minecraft:spawner"
     }]
   }]
  }]
}