Adaptive Card - Dynamically Generated Choices V1.5 - adaptive-cards

Question

I have the following old Adaptive card from a Playbook which I need to update to v1.5. But I stumble upon a problem with the choices which are dynamically generated from a logic app body. I have made the part of the code bold. There is a value that is not JSON proof so it should be required to convert it to JSON that way.
{
"type": "Input.ChoiceSet",
"choices": #{body('LogicApp_-_Get_tagged_playbooks')}, #THIS IS THE LINE THAT NEEDS TO BE CHANGED
"placeholder": "IP Playbooks",
"isMultiSelect": true,
"style": "expanded",
"id": "playbooks"
}
Full Code:
{
"msTeams": {
"width": "full"
},
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"type": "AdaptiveCard",
"version": "1.2",
"body": [
{
"type": "TextBlock",
"size": "large",
"color": "accent",
"text": "**Microsoft Sentinel Alert - **#{triggerBody()?['object']?['properties']?['incidentNumber']} - #{triggerBody()?['object']?['properties']?['title']}",
"wrap": true
},
{
"type": "TextBlock",
"text": "Please Select the playbooks to run for the incident:",
"weight": "Bolder"
},
{
"type": "TextBlock",
"text": "Available tagged Logic App playbooks",
"wrap": true,
"weight": "Bolder",
"color": "Accent"
},
{
"type": "Input.ChoiceSet",
"choices": #{body('LogicApp_-_Get_tagged_playbooks')},
"placeholder": "IP Playbooks",
"isMultiSelect": true,
"style": "expanded",
"id": "playbooks"
}
],
"actions": [
{
"type": "Action.Submit",
"title": "Submit"
}
]
}
Could someone help me converting only that part of the choices to v1.5 so I can properly generate the choices myself? Or do I need to make my card legacy supported and drop it back to v1.2? I really want to use the card designer so I can make it easier.
Thanks in advance.