"Update Many Macros" Endpoint Not Updating Actions

Hi team,

Could someone please help me figure out how to format the json to set actions (i.e., update fields) for many macros at once? I'm looking here, but it only shows me how to update the active status for the macro or the macro position. But I need to update other fields (like, all of them: priority, type, comment text, category, etc) for ~500 macros, so I'm desperately hoping I'm just formatting my json incorrectly and it's not the case that you can only use this endpoint for updating active status and position :x.

This is the json I used to test, and the active status changed properly but the actions didn't stick. Am I formatting incorrectly?

{
   "macros":
   [
       {
           "id": 1234,
           "active": false,
           "actions":
           [
               {
                   "field": "subject",
                   "value": "New, many-update subject."
               },
               {
                   "field": "status",
                   "value": "pending"
               }
           ]
       },
       {
           "id": 12345,
           "active": false,
           "actions":
           [
               {
                   "field": "subject",
                   "value": "New, many-update subject."
               },
               {
                   "field": "status",
                   "value": "pending"
               }
           ]
       }
   ]
}