bedrock-samples/behavior_pack/loot_tables/entities/zombie_pigman_gear.json

{
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "item",
          "name": "minecraft:golden_sword",
          "weight": 1,
          "functions": [
            {
              "function": "looting_enchant",
              "count": {
                "min": 0,
                "max": 1
              }
            },
            {
              "function": "enchant_random_gear",
              "chance": 0.25
            }
		  ]
        }
      ]
    }
  ]
}