Default action activated in JSON theme file

I would like to have a default action type activated in the action button. I would like the default activated action to be "Bookmark" and set to "None":

This is particularly important seeing as the hover fill colour does not show if there is not an action activated :-§

My action button code is currently:

"actionButton": {
"*": {
"shape": [
{
"$id": "default",
"tileShape": "rectangle",
"roundEdge": 20
}
],
"icon": [
{
"$id": "default",
"rightMargin": 2,
"leftMargin": 8,
"topMargin": 2,
"bottomMargin": 2,
"iconSize": 16
},
{
"show": true
}
],
"text": [
{
"$id": "default",
"show": true,
"fontColor": {
"solid": {
"color": "#7F7E79"
}
}
},
{
"$id": "hover",
"fontColor": {
"solid": {
"color": "#FFFFFF"
}
}
},
{
"$id": "selected",
"fontColor": {
"solid": {
"color": "#FFFFFF"
}
}
},
{
"show": true
}
],
"outline": [

{
"show": false
}
],
"fill": [
{
"$id": "default",
"fillColor": {
"solid": {
"color": "#D8D8D3"
}
},
"transparency": 0
},
{
"$id": "hover",
"fillColor": {
"solid": {
"color": "#7F7E79"
}
}
},
{
"$id": "press",
"fillColor": {
"solid": {
"color": "#11387F"
}
}
},
{
"$id": "selected",
"fillColor": {
"solid": {
"color": "#11387F"
}
}
},
{
"$id": "applied",
"fillColor": {
"solid": {
"color": "#11387F"
}
}
},
{
"show": true
}
],
"title": [
{
"show": false,
"fontColor": {
"solid": {
"color": "#0B1128"
}
},
"background": {
"solid": {
"color": "#FFFFFF00"
}
}
}
],
"background": [
{
"show": false,
"color": {
"solid": {
"color": "#D8D8D3"
}
},
"transparency": 0
}
],
"border": [
{
"color": {
"solid": {
"color": "#EEEEEC"
}
},
"show": false,
"roundEdge": 4
}
]
}
},

Thanks in advance 🙂