curl --request GET \
  --url https://arch-testnet.gomaestro-api.org/v0/rpc/account/info/{address} \
  --header 'api-key: <api-key>'

{
  "data": {
    "data": [
      123
    ],
    "is_executable": true,
    "owner": [
      123
    ],
    "utxo": "<string>"
  },
  "last_updated": {
    "block_hash": "<string>",
    "block_height": 123
  }
}