Firstly, the "Flow creation via REST API" post is the right place to start.
This will give you the JSON schema used to create flows.
Note: Don't worry about not accessing the genesis.americas.hpqcorp.net website - that's HP internal only.
To post to the MAC-IP and Extensibility tables will require knowledge of the OpenFlow implementation in your switch.
The "table_id" will specify which table the flow will be installed in.
You will need to be mindful of the Match/Actions supported in each table to make sure the flow is successfully installed.
Hope this helps
-- Dave