post https://api.overledger.dev/api/preparations/transactions/smart-contracts/write
When creating a transaction in Overledger, the first step is to prepare the transaction for signing. This API allows you to call any function that changes/updates data on any contract deployed on Ethereum based blockchains or the Hyperledger Fabric Sandbox. This first step transforms a transaction request into a payload that can be signed and then returns a request ID that is used to execute the transaction after it is signed.