curl --request GET \
  --url https://api.onchainden.com/api/v1/accounts/{accountId}/balances \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "accountId": "acc_123",
    "balances": [
      {
        "networkId": 1,
        "symbol": "ETH",
        "name": "Ether",
        "amount": "1.5",
        "decimals": 123,
        "contractAddress": "0xdef...abc"
      }
    ],
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}