curl --request POST \
  --url https://api.anchorage-staging.com/v2/subaccounts/customers/{customerId}/accounts \
  --header 'Api-Access-Key: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Subaccount Name",
  "externalSubaccountId": "EXTERNAL_ID_001",
  "fees": [
    {
      "type": "ADVISORY",
      "rate": 0.01
    },
    {
      "type": "MODEL",
      "rate": 0.01,
      "isBillable": false
    },
    {
      "type": "MANAGEMENT",
      "rate": 0.01
    }
  ]
}
'

import requests

url = "https://api.anchorage-staging.com/v2/subaccounts/customers/{customerId}/accounts"

payload = {
    "name": "Subaccount Name",
    "externalSubaccountId": "EXTERNAL_ID_001",
    "fees": [
        {
            "type": "ADVISORY",
            "rate": 0.01
        },
        {
            "type": "MODEL",
            "rate": 0.01,
            "isBillable": False
        },
        {
            "type": "MANAGEMENT",
            "rate": 0.01
        }
    ]
}
headers = {
    "Api-Access-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Api-Access-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'Subaccount Name',
    externalSubaccountId: 'EXTERNAL_ID_001',
    fees: [
      {type: 'ADVISORY', rate: 0.01},
      {type: 'MODEL', rate: 0.01, isBillable: false},
      {type: 'MANAGEMENT', rate: 0.01}
    ]
  })
};

fetch('https://api.anchorage-staging.com/v2/subaccounts/customers/{customerId}/accounts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

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

{
  "errorType": "InternalError",
  "message": "Missing required field 'amount'."
}

{
  "errorType": "InternalError",
  "message": "Missing required field 'amount'."
}

{
  "errorType": "InternalError",
  "message": "Missing required field 'amount'."
}

{
  "errorType": "InternalError",
  "message": "Missing required field 'amount'."
}

{
  "errorType": "InternalError",
  "message": "Missing required field 'amount'."
}