Is it possible to manually create a Hash Time Locked Contract using the bitcoin-qt command line?

I have dabbled with manually creating createrawtransaction / sendrawtransaction using the bitcoin-qt clients command line, and wanted to know how to manually create a Hash Time Locked Contract.

When I say "manually", I mean, really getting your hands dirty, like using notepad to construct the contract/script, putting the values into bitcoin-cli, to convert it into a hash, ready for it to be sent using sendrawtransaction.