List Perpetuals Positions

curl --request GET \
  --url https://api.coinbase.com/api/v3/brokerage/intx/positions/{portfolio_uuid}

{
  "positions": [
    {
      "product_id": "<string>",
      "product_uuid": "<string>",
      "portfolio_uuid": "<string>",
      "symbol": "<string>",
      "vwap": {
        "value": "<string>",
        "currency": "<string>"
      },
      "entry_vwap": {
        "value": "<string>",
        "currency": "<string>"
      },
      "position_side": "<any>",
      "margin_type": "<any>",
      "net_size": "<string>",
      "buy_order_size": "<string>",
      "sell_order_size": "<string>",
      "im_contribution": "<string>",
      "unrealized_pnl": {
        "value": "<string>",
        "currency": "<string>"
      },
      "mark_price": {
        "value": "<string>",
        "currency": "<string>"
      },
      "liquidation_price": {
        "value": "<string>",
        "currency": "<string>"
      },
      "leverage": "<string>",
      "im_notional": {
        "value": "<string>",
        "currency": "<string>"
      },
      "mm_notional": {
        "value": "<string>",
        "currency": "<string>"
      },
      "position_notional": {
        "value": "<string>",
        "currency": "<string>"
      },
      "aggregated_pnl": {
        "value": "<string>",
        "currency": "<string>"
      }
    }
  ],
  "summary": {
    "aggregated_pnl": {
      "value": "<string>",
      "currency": "<string>"
    }
  }
}