hash.wal

{
  "name": "undo",
  "base": "",
  "fields": [
    {
      "name": "product_id",
      "type": "uint64"
    },
    {
      "name": "record_id",
      "type": "uint64"
    },
    {
      "name": "user",
      "type": "name"
    }
  ]
}