Steps to get the nudge_token for campaign
While creating behaviors in BME, You might need to provide the nudge_tokens to map the messages sent/opened as a part of behavior conditions. Perform the below steps to get the nudge_tokens.
Select the campaign for which you want the nudge_token. Right click on the page and select inspect when you are in the campaign page.
A console block would be displayed as shown below. Click on the Network tab and then click the Edit (pencil) option.
Look for a number in the network calls that would be displayed under the Network tab. 24970 is the number for the campaign (see the above screenshot) that I have selected and it would be different for different campaigns.You could get the number from the url.
Copy paste the content under Response tab into a text file and look for nudge_token to get the nudge token.