curl --request POST \
  --url http://localhost:8545/ \
  --header 'content-type: application/json' \
  --data '{
	"id": 3978791466282,
	"jsonrpc": "2.0",
	"params": [
		{
			"from": "0x90f8bf6a479f320ead074411a4b0e7944ea8c9c1",
			"to": "0x0d370b0974454d7b0e0e3b4512c0735a6489a71a",
			"value": "0x0",
			"data": "0x969494200000000000000000000000000000000000000000000000000000000000000002",
			"gas": "0x6170d4",
			"gasPrice": "0x174876e800"
		}
	],
	"method": "eth_estimateGas"
}'