This endpoint above retrieves both the custom properties as well as default properties of a deal but I need to retrieve only those properties which are custom added in "groupName": "deal information",
1. I need to retrieve only those custom fields dynamically which were added by me later in a deal, I do not want to retrieve any default properties of the deal.
2. Solution given by you can add a parameter to your API call to select properties you want to return.
eg: &properties=i_like_cats
In this solution, I need to provide separately all the custom deal properties key names this is not what I want. I need to retrieve all the custom deal properties added by me at once via API is there any filter that can detect the custom fields which added manually in a deal.