curl --request GET \
  --url https://api.prime.coinbase.com/v1/entities/{entity_id}/tf_obligations

{
  "obligations": [
    {
      "portfolio_id": "e8bbed13-fa33-41de-86d5-4335d8f08166",
      "symbol": "BTC",
      "amount_due": "150000",
      "notional_amount": "250000",
      "due_date": "1000"
    }
  ]
}