Hi @mittalvishesh,
It looks like your Postman request is url encoded and has a Content-Type of application/x-www-form-urlencoded. Our API requires a Content-Type of application/json and all POST bodies must be JSON formatted (which is what your curl is). You would need to tell Postman to change the Content-Type and possibly format the data yourself into JSON rather than using Postman's auto key value formatter.