This method returns raw bytes for chainspec files.
{
"jsonrpc": "2.0",
"result": {
"api_version": "1.5.0",
"chainspec_bytes": {
"chainspec_bytes": "[22040 hex chars]",
"maybe_genesis_accounts_bytes": null,
"maybe_global_state_bytes": null
}
},
"id": 5510244237763930243
}