curl --fail-with-body "$THORNODE_RPC_URL" \
  --header 'content-type: application/json' \
  --data '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getTokenAccountsByDelegate",
    "params": [
      "4aR1CeodjCPyyuVDbhP1yd2xPX6H6A2fZ7bApXyVmCrY",
      {
        "programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
      },
      {
        "encoding": "base64"
      }
    ]
  }'

const body = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getTokenAccountsByDelegate",
  "params": [
    "4aR1CeodjCPyyuVDbhP1yd2xPX6H6A2fZ7bApXyVmCrY",
    {
      "programId": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"
    },
    {
      "encoding": "base64"
    }
  ]
};

const response = await fetch(process.env.THORNODE_RPC_URL, {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify(body),
});
const { result, error } = await response.json();
console.log(result ?? error);

{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "slot": 439749211
    },
    "value": [
      {
        "pubkey": "11oFyVtvKJtvSb3Q3g7XYKBtTq9DQv7ACGPktrbsivq",
        "account": {
          "lamports": 2039280,
          "data": [
            "CfeYVN/YnqzUZq2UJt1Nos31imWh2fOzGmFxcwr9mLLfXzZ2PsczMKJGcWdNazIEIk1HC6wSwTtXz2ZjIfEJbS19axYAAAAAAQAAADUiXkexKrwMpHghKADZIeEf20vNonSCszjxbTPOAYFlAQAAAAAAAAAAAAAAAC19axYAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
            "base64"
          ],
          "owner": "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
          "executable": false,
          "rentEpoch": 18446744073709551615,
          "space": 165
        }
      }
    ]
  },
  "id": 1
}