write your conditional logic not as JSON but as value.
Your options should look something like this:
and the conditional logic should be
The if-statement in the HTML should look like this:
{% if module.layout == "col-md-12" %}
{# content for 1 Column goes here #}
{% elif module.layout == "col-md-6" %}
{# content for 2 Column goes here #}
{% elif module.layout == "col-md-4" %}
{# content for 3 Column goes here #}
{% elif module.layout == "col-md-12 box-form" %} {# instead of elif... you can write just else #}
{# content for form goes here #}
{% endif %}