getAccountInfo

curl --request POST \
  --url https://mainnet.helius-rpc.com/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getAccountInfo",
  "params": [
    "83astBRguLMdt2h5U1Tpdq5tjFoJ6noeGwaY3mDLVcri",
    {
      "encoding": "base58"
    }
  ]
}'

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "apiVersion": "2.0.15",
      "slot": 341197053
    },
    "value": {
      "lamports": 88849814690250,
      "owner": "11111111111111111111111111111111",
      "data": [
        "",
        "base58"
      ],
      "executable": false,
      "rentEpoch": 18446744073709552000,
      "space": 0
    }
  },
  "id": 1
}