Hi @Aman Singh ,
AudienceUriValidationFailedException means you don't have the permission to the crud operation. Please check your steps to get AccessToken by following.
Granting access using SharePoint App-Only
https://learn.microsoft.com/en-us/sharepoint/dev/solution-guidance/security-apponly-azureacs
Then you can refer to following steps get AccessToken
https://global-sharepoint.com/sharepoint-online/in-4-steps-access-sharepoint-online-data-using-postman-tool/
The url should be like https://######.sharepoint.com/sites/***/_api/site/recyclebin
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