curl --request GET \
  --url https://api.copper.co/platform/portfolios

{
  "portfolios": [
    {
      "createdAt": "<string>",
      "createdBy": "<string>",
      "isActive": true,
      "portfolioId": "<string>",
      "portfolioName": "<string>",
      "extra": {
        "baseCurrency": "<string>",
        "clearLoopDelegationsBlocked": true,
        "clearLoopPortfolioId": "<string>",
        "clearLoopUnDelegationsBlocked": true,
        "clientAccountId": "<string>",
        "customerId": "<string>",
        "exchange": "<string>",
        "externalAccountId": "<string>",
        "parentPortfolioId": "<string>",
        "quoteCurrency": "<string>",
        "usdWithdrawalLimit": "<string>"
      },
      "organizationId": "<string>",
      "portfolioDescription": "<string>",
      "updatedAt": "<string>",
      "updatedBy": "<string>"
    }
  ]
}