curl --request POST \
  --url 'https://rpc-mainnet.solanatracker.io/?api_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getTokenAccountBalance",
  "params": [
    "121k79rjdDy4QRuSykdG1Dw7pYCZSzKYrvs7RDKZTf1h"
  ]
}
'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "context": {
      "slot": 1114
    },
    "value": {
      "amount": "9864",
      "decimals": 2,
      "uiAmount": 98.64,
      "uiAmountString": "98.64"
    }
  }
}