Not directly within the Narrative platform at this time. You will need to redeem some of your NRVE credits into a NEO based cryptocurrency wallet first. Here is some guidance on setting up a wallet.
Once your NRVE credits are redeemed and available in your wallet, you can pay for your Niche with NRVE. When you go to pay for your NICHE, you will just provide your wallet address and the NRVE will process between your wallet and Narrative.