curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{"jsonrpc": "2.0",
"method": "on_get_block_hash",
"params": {"block height": 912345},
"id": "getblock.io"}'{
"id": "getblock.io",
"jsonrpc": "2.0",
"result": "e22cf75f39ae720e8b71b3d120a5ac03f0db50bba6379e2850975b4859190bc6"
}