I would gladly help you on this. I went through this not long time ago.
Use update_account

Parameters:
    accountname: The name of the account (type: string)
    json_meta: New JSON Metadata to be associated with the account (type:
        string)
    owner: New public owner key for the account (type: public_key_type)
    active: New public active key for the account (type: public_key_type)
    posting: New public posting key for the account (type: public_key_type)
    memo: New public memo key for the account (type: public_key_type)
    broadcast: true if you wish to broadcast the transaction (type: bool)

so your command would look like this:
update_account balkanbot "" key1 key2 key3 key4 true

key1, key2, key3, key4 should be public keys for your key pairs.
key1 might be your current public key so you won't change key for owner
To generate new key pairs using cli_wallet use suggest_brain_key command.
For each key pair that would be generated by that command:
wif_priv_key is what you should save in safe place (private key)
pub_key is what you should use for key1 (then next for key2, and so on)

I hope that this makes sense :)