Shared Key authorization for blobs, files, queues, and tables. A client using Shared Key passes a header with every request that is signed using the storage account access key.
blob
How to authenticate service principal with ‘client_secret’ in Pre-Request Scripts using Postman
Service Principal can be authenticated for azure resources by adding scripts to Pre-Request Scripts section in Postman.
How to use Azure blob storage service REST API operations using POSTMAN
REST API for the Blob service can be used to upload, manage, organize, and delete text and binary data.