post
https://app.bitgo-test.com/api/v2/wallet//msgrequests
Create a transaction request for signing a message with the wallet keys. Wallet requirement: Only multi-party computation (MPC) wallets are supported. Supported chains: EVM-compatible chains (ETH, BSC, Polygon, etc.), Solana, and Cardano. UTXO-based chains (Bitcoin, Litecoin, etc.) are not supported.