{
  "conditions": [
    {
      "operator": "AND",
      "conditions": [
        {
          "operator": "IS_DESCENDANT",
          "value": "a"
        },
        {
          "operator": "AND",
          "conditions" [
            {}
          ]
        }
      ]
    }
  ]
}

"conditions": [
  {
    "operator": "IS_DESCENDANT",
    "value": "a"
  },
  {
    "operator": "AND",
    "conditions" [
      {}
    ]
  }
]