Get groups tree

{
  "type": "object",
  "required": [
    "action",
    "data",
    "result"
  ],
  "properties": {
    "action": {
      "type": "string",
      "description": "The id of the action",
      "enum": [
        "GetGroupTree"
      ]
    },
    "data": {
      "type": "object",
      "required": [
        "groupCategories"
      ],
      "properties": {
        "groupCategories": {
          "type": "object",
          "description": "Group tree"
        }
      }
    },
    "result": {
      "type": "string",
      "description": "Result of the request",
      "enum": [
        "success",
        "error"
      ]
    }
  }
}