curl --request PATCH \
  --url https://api.anchorage-staging.com/v2/subaccounts/accounts/{subaccountId} \
  --header 'Api-Access-Key: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fees": [
    {
      "type": "ADVISORY",
      "rate": 0.01,
      "startDate": "2023-12-01"
    }
  ]
}
'

{
  "data": {
    "subaccountId": "ec761b5e-fd2c-497a-a9a0-f8738ac97bdf"
  }
}