{
  "alloc": $account_balances,
  "coinbase": "0x0000000000000000000000000000000000000000",
  "config": {
    "homesteadBlock": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "chainId": $chain_id,
    "eip150Block": 0,
    "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "eip155Block": 0,
    "eip158Block": 0,
    "isQuorum": true,
    "maxCodeSizeConfig": [
      {
        "block": 0,
        "size": 32
      }
    ],
    "istanbul": {
      "epoch": 30000,
      "policy": 0,
      "ceil2Nby3Block": 0
    }
  },
  "extraData": $extra_data,
  "gasLimit": "0xE0000000",
  "difficulty": "0x1",
  "mixhash": "0x63746963616c2062797a616e74696e65206661756c7420746f6c6572616e6365",
  "nonce": "0x0",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"
}
