curl --request GET \
  --url https://{instance}.omniapp.co/api/v1/dashboards/{dashboardId}/filters \
  --header 'Authorization: Bearer <token>'

{
  "identifier": "abc123",
  "filters": {
    "order_status": {
      "type": "string",
      "kind": "EQUALS",
      "values": [
        "completed",
        "pending"
      ],
      "label": "Order Status",
      "description": "Filter by order status",
      "required": false,
      "hidden": false
    },
    "order_date": {
      "type": "date",
      "kind": "WITHIN_RANGE",
      "left_side": "2024-01-01",
      "right_side": "2024-12-31",
      "label": "Order Date"
    }
  },
  "controls": [
    {
      "id": "field_selector",
      "type": "FIELD_SELECTION",
      "kind": "FIELD",
      "label": "Metric Selector",
      "field": "orders.revenue",
      "options": [
        {
          "label": "Revenue",
          "value": "orders.revenue"
        },
        {
          "label": "Quantity",
          "value": "orders.quantity"
        }
      ]
    }
  ],
  "filterOrder": [
    "order_status",
    "order_date",
    "field_selector"
  ]
}