Encodes an EigenPodManager.createPod() call. Creates a new EigenPod for the staker.
Each wallet can only have one EigenPod. If a pod already exists, the on-chain transaction will revert.

Returns an unsigned transaction for client-side signing and broadcasting.

Nonce handling: The nonce is computed at call time. If you prepare multiple transactions before broadcasting, they will share the same nonce and only the first will succeed. Broadcast and confirm each transaction before preparing the next.