Need help getting keys for video downloaded from Kanopy

Hello, I need some help getting the decryption keys for a video from Kanopy. From previous threads, it seems you can get the keys from either https://wv-keyos.licensekeyserver.com/ or https://kcms.kanopy.com/api/v1/playback/widevine_license but it seems the video I need uses neither. Instead, the URL is https://www.kanopy.com/kapi/licenses/widevine/1729698656171023665-0.

I have tried providing my cookies, header, and JSON data in a POST request to the URL but I get a 404 error instead of a 200 OK that I see when playing the video in the browser.

MPD: https://www.kanopy.com/kapi/manifests/dash/5636616.mpd
PSSHL: AAAAU3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADMIARIQhq Zf/4MdQOK5wX3LOhS4CBoLYnV5ZHJta2V5b3MiEDHVRqZnRUXTipp y/BDbDlo=

Here's the response from kanopy.com/kapi/plays.

Code:

{
    "playId": "1729698656171023665",
    "manifests": [
        {
            "manifestType": "hls",
            "url": "https://www.kanopy.com/kapi/manifests/hls/5636616.m3u8",
            "drmType": "kanopyDrm",
            "kanopyDrm": {
                "authXml": "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"
            },
            "storageService": "backblaze_001",
            "cdn": "cloudflare",
            "drmLicenseID": "1729698656171023665-0"
        },
        {
            "manifestType": "dash",
            "url": "https://www.kanopy.com/kapi/manifests/dash/5636616.mpd",
            "drmType": "kanopyDrm",
            "kanopyDrm": {
                "authXml": "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"
            },
            "storageService": "backblaze_001",
            "cdn": "cloudflare",
            "drmLicenseID": "1729698656171023665-0"
        }
    ],
    ...
}

I'm not sure where to go from here. Any support would be greatly appreciated!