curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc": "2.0", "id": 1, "method": "eth_blockNumber", "params": []}' "https://mainnet.infura.io/v3/fbd7e21dd9324b38b56294db620093cf
curl --json '{"jsonrpc": "2.0", "id": 1, "method": "eth_blockNumber", "params": []}' “https://mainnet.infura.io/v3/fbd7e21dd9324b38b56294db620093cf“
eth_blockNumber