Mark a subscriber feed messages as seen or as read

curl --request POST \
  --url https://api.novu.co/v1/subscribers/{subscriberId}/messages/markAs \
  --header 'Content-Type: application/json' \
  --data '{
  "messageId": "<string>",
  "mark": {
    "seen": true,
    "read": true
  }
}'

{
  "data": [
    {
      "_id": "<string>",
      "_templateId": "<string>",
      "_environmentId": "<string>",
      "_messageTemplateId": "<string>",
      "_organizationId": "<string>",
      "_notificationId": "<string>",
      "_subscriberId": "<string>",
      "subscriber": {
        "_id": "<string>",
        "firstName": "<string>",
        "lastName": "<string>",
        "email": "<string>",
        "phone": "<string>",
        "avatar": "<string>",
        "locale": "<string>",
        "subscriberId": "<string>",
        "channels": [
          {
            "providerId": "slack",
            "integrationIdentifier": "<string>",
            "credentials": {
              "webhookUrl": "<string>",
              "channel": "<string>",
              "deviceTokens": [
                "<string>"
              ],
              "alertUid": "<string>",
              "title": "<string>",
              "imageUrl": "<string>",
              "state": "<string>",
              "externalUrl": "<string>"
            },
            "_integrationId": "<string>"
          }
        ],
        "isOnline": true,
        "lastOnlineAt": "<string>",
        "_organizationId": "<string>",
        "_environmentId": "<string>",
        "deleted": true,
        "createdAt": "<string>",
        "updatedAt": "<string>",
        "__v": 123
      },
      "template": {
        "_id": "<string>",
        "name": "<string>",
        "description": "<string>",
        "active": true,
        "draft": true,
        "preferenceSettings": {
          "email": true,
          "sms": true,
          "in_app": true,
          "chat": true,
          "push": true
        },
        "critical": true,
        "tags": [
          "<string>"
        ],
        "steps": [
          {
            "_id": "<string>",
            "uuid": "<string>",
            "name": "<string>",
            "_templateId": "<string>",
            "active": true,
            "shouldStopOnFail": true,
            "template": {},
            "filters": [
              {
                "isNegated": true,
                "type": "BOOLEAN",
                "value": "AND",
                "children": [
                  {
                    "field": "<string>",
                    "value": "<string>",
                    "operator": "LARGER",
                    "on": "subscriber"
                  }
                ]
              }
            ],
            "_parentId": {},
            "metadata": {
              "amount": 123,
              "unit": "seconds",
              "digestKey": "<string>",
              "type": "regular",
              "backoff": true,
              "backoffAmount": 123,
              "backoffUnit": "seconds",
              "updateMode": true
            },
            "replyCallback": {},
            "variants": {
              "_id": "<string>",
              "uuid": "<string>",
              "name": "<string>",
              "_templateId": "<string>",
              "active": true,
              "shouldStopOnFail": true,
              "template": {},
              "filters": [
                {
                  "isNegated": true,
                  "type": "BOOLEAN",
                  "value": "AND",
                  "children": [
                    {
                      "field": "<string>",
                      "value": "<string>",
                      "operator": "LARGER",
                      "on": "subscriber"
                    }
                  ]
                }
              ],
              "_parentId": {},
              "metadata": {
                "amount": 123,
                "unit": "seconds",
                "digestKey": "<string>",
                "type": "regular",
                "backoff": true,
                "backoffAmount": 123,
                "backoffUnit": "seconds",
                "updateMode": true
              },
              "replyCallback": {}
            }
          }
        ],
        "_organizationId": "<string>",
        "_creatorId": "<string>",
        "_environmentId": "<string>",
        "triggers": [
          {
            "type": "event",
            "identifier": "<string>",
            "variables": [
              {
                "name": "<string>"
              }
            ],
            "subscriberVariables": [
              {
                "name": "<string>"
              }
            ]
          }
        ],
        "_notificationGroupId": "<string>",
        "_parentId": "<string>",
        "deleted": true,
        "deletedAt": "<string>",
        "deletedBy": "<string>",
        "notificationGroup": {
          "_id": "<string>",
          "name": "<string>",
          "_environmentId": "<string>",
          "_organizationId": "<string>",
          "_parentId": "<string>"
        },
        "data": {},
        "workflowIntegrationStatus": {}
      },
      "templateIdentifier": "<string>",
      "createdAt": "<string>",
      "content": {
        "type": "text",
        "content": "<string>",
        "url": "<string>",
        "styles": {
          "textAlign": "left"
        }
      },
      "transactionId": "<string>",
      "subject": "<string>",
      "channel": "in_app",
      "seen": true,
      "email": "<string>",
      "phone": "<string>",
      "directWebhookUrl": "<string>",
      "providerId": "<string>",
      "deviceTokens": [
        "<string>"
      ],
      "title": "<string>",
      "lastSeenDate": "<string>",
      "cta": {
        "type": "redirect",
        "data": {
          "url": "<string>"
        },
        "action": {
          "status": "pending",
          "buttons": [
            {
              "type": "primary",
              "content": "<string>",
              "resultContent": "<string>"
            }
          ],
          "result": {
            "payload": {},
            "type": "primary"
          }
        }
      },
      "_feedId": "<string>",
      "status": "sent",
      "errorId": "<string>",
      "errorText": "<string>",
      "payload": {},
      "overrides": {}
    }
  ]
}