Look up an account

{  "accountId": "string",  "balances": [    {      "assetCode": "string",      "assetIssuer": "string",      "assetType": "string",      "balance": "string",      "exact": {        "assetId": "string",        "liquidityPoolId": "string",        "balanceRaw": "string",        "buyingLiabilities": "string",        "buyingLiabilitiesRaw": "string",        "sellingLiabilities": "string",        "sellingLiabilitiesRaw": "string",        "trustLineLimit": "string",        "trustLineLimitRaw": "string",        "isAuthorized": true,        "isAuthorizedToMaintainLiabilities": true,        "isClawbackEnabled": true,        "sponsor": "string"      }    }  ],  "lastModifiedLedger": "string",  "sequence": "string",  "source": "horizon",  "subentryCount": 0,  "accounting": {    "scope": "horizon_account_balances",    "networkPassphrase": "string",    "snapshotStatus": "ledger_bound",    "latestLedger": "string",    "ledgerClosedAt": "string",    "baseReserveRaw": "string",    "baseReserveLedger": "string",    "subentryCount": "string",    "numSponsoring": "string",    "numSponsored": "string",    "balanceInventoryComplete": true  }}