post
https://api.contributiondao.com/api/v1.0/ethereum/transactions/submit
Broadcasts a signed, serialized Ethereum transaction to the network.
This endpoint is the final step for custodian services or integrators. It accepts the signedTxSerialized
(RLP-encoded hex string generated and signed by the custodian) and submits it directly to the
Ethereum network via the backend's RPC nodes.