curl --request POST \
  --url 'https://api.avax.network/ext/bc/P#platform.getBalance' \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "method": "platform.getBalance",
  "params": {},
  "id": 1
}'

{
  "jsonrpc": "2.0",
  "result": {
    "balance": "1000000000",
    "unlocked": "1000000000",
    "lockedStakeable": "1000000000",
    "lockedNotStakeable": "1000000000",
    "balances": {},
    "unlockeds": {},
    "lockedStakeables": {},
    "lockedNotStakeables": {},
    "utxoIDs": [
      {}
    ]
  },
  "id": 1
}