How to save the returned data from a Flexcard Action

Question

I want to save the response from an Integration Procedure that is triggered from a button on a Flexcard to the Flexcard's JSON:

• The one button will throw an error (not passing a recordId to the IP)
• The other button will successfully update the Opportunity record

The response from the IP for a successful update is:

{
  "result": {
    "error": false,
    "errorMessage": null
  },
  "success": true
}

and when it throws an error:

{
  "result": {
    "error": true,
    "errorMessage": "Required fields are missing: [Name, StageName, CloseDate]"
  },
  "success": false
}

It seems like the response is not saved to the JSON of the Flexcard. I followed the instructions as per the Salesforce help file here.

When I click the button, the Action Debugger shows that the IP ran and it returned the expected response:

When looking at the Data JSON tab, the response is not included in the cards JSON node (as shown in the Salesforce help file):

On both buttons, the option IgnoreResponse = FALSE, but try as I might the IP's response is not added to the JSON.

Any assistance/suggestions/lessons learnt would be appreciated

Thanks!