Using Toggle Button without sub-values in Variable

Dear App Builders,

is there a way to use a toggle button with a variable that does not have “sub-values”?
In the variable definition I can write “default”: “somevalue” or I can write “default”: {“sub1”: “somevalue1”, “sub2”: “somevalue2”}. The latter is what I mean by “sub-value”.
For me, the toggleButton element complains if I try to have it write in a variable that does not have sub-values.
In the toggle button my definition has to look like this:
“left”: {
“label”: “Toggle Label 1”,
“value”: {
“sub”: “somevalue1”
}
},
and I cannot use it like
“left”: {
“label”: “Toggle Label 1”,
“value”: “somevalue”
},