How can I change the frame rate when generating a video from a template?

I couldn't find any information in the documentation on how to configure the FPS.

Below is the payload I am using:

{
"title": "GENERATE VIDEO FROM TEMPLATE",
"variables": {
"script_en": {
"name": "script_en",
"type": "text",
"properties": {
"content": "THIS IS ONLY A TEST"
}
}
},
"dimension": {
"width": 720,
"height": 1280
}
}

I really want to change the FPS. Could someone help me with how to do this?