curl --request GET \
  --url https://api.avenia.io:8443/v2/v2/account/sub-accounts/{sub-account-id} \
  --header 'Authorization: Bearer <token>'

{
  "subAccount": {
    "id": "<string>",
    "accountType": "<string>",
    "name": "<string>",
    "createdAt": "<string>"
  }
}