How to obtain error details in CPQ REST API response of modify action type

Summary:

We are expecting the custom error messages of the validation rules that are triggered on CPQ action clicks, to also appear in the REST API call of that action

Content (please ensure you mask any confidential information):

We are triggering a CPQ Commerce Modify type action's REST API call and it doesn't give a proper error message which is specified in the validation rule (even after adding the state as true in the request body) in the error description for the integration team to properly debug quote, giving the API URL and payload as below:

URL: https://sitename.bigmachines.com/rest/v12/commerceQuotesOraclecpqoTransaction/{{transactionId}}/actions/order_start