const options = {
  method: 'POST',
  headers: {cookie: 'session=', 'Content-Type': 'application/json'},
  body: JSON.stringify({action: 'mark_read', ids: ['<string>'], dryRun: false})
};

fetch('https://api.example.com/v1/regions/global/notifications/inbox/bulk', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "success": true,
  "data": {
    "action": "<string>",
    "requested": 123,
    "succeeded": 123,
    "failed": 123,
    "dryRun": true,
    "wouldAffect": 123,
    "preview": [
      {
        "id": "<string>",
        "category": "system",
        "priority": "low",
        "title": "<string>",
        "message": "<string>",
        "read": true,
        "createdAt": "2023-11-07T05:31:56Z",
        "resourceType": "<string>",
        "resourceId": "<string>",
        "actionUrl": "<string>",
        "clickActionUrl": "<string>",
        "primaryActionLabel": "<string>",
        "primaryActionUrl": "<string>",
        "secondaryActionLabel": "<string>",
        "secondaryActionUrl": "<string>",
        "readAt": "2023-11-07T05:31:56Z"
      }
    ],
    "results": [
      {
        "id": "<string>",
        "status": "success",
        "error": {}
      }
    ]
  },
  "meta": {}
}