post
https://api.twinstake.io/v2/staking/ethereum/validators/top-up
This endpoint will allow the topping up of the balance for a 0x02 validator type - up to a maximum validator balance of 2048 ETH.
The deposit transaction information is returned asynchronously and accessed through the [GET] /v2/staking/ethereum/validators/top-up endpoint.
Please note that this endpoint can only be used to top up Twinstake validators.