Creating Folder in Sharepoint Site from Postman

Hi All, 

We're trying to create a folder in the SharePoint from third party system with the help of the link, prior to that we are trying it from Postman, but the call takes about a minute with out any response.  

Step 1: Get the access token (Bearer token)

Step 2: Using the Step 1 token get the X-RequestDigest value.

Step 3: Using the Step 1 token and Step 2 "FormDigestValue" preparing the next call to Create a folder in SharePoint.

          3.a  Header Info

           3.b Body

Step 3 Call response: "Could not get response".

Is there any issue in the call? Can you please give us any direction to resolve this issue.

Appreciate your help. Thanks you