How to upload a file from Postman using AWS S3 signed url?

Question 1

I want to achieve the following –
1. Generate a signed URL
2. Upload a file (image.jpg), to the URL using Postman

I am using AWS Node SDK to create the URL,
Following is the code –

const AWS = require('aws-sdk');

AWS.config.update({
    region: 'us-east-1'
});

const s3 = new AWS.S3();

var presignedPUTURL = s3.getSignedUrl('putObject', {
    Bucket: 'some-bucket',
    Key: 'test/image.jpg',
    Expires: 3600
});

console.log(presignedPUTURL);

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const AWS = require('aws-sdk');

AWS.config.update({

region: 'us-east-1'

});

const s3 = new AWS.S3();

var presignedPUTURL = s3.getSignedUrl('putObject', {

Bucket: 'some-bucket',

Key: 'test/image.jpg',

Expires: 3600

});

console.log(presignedPUTURL);

The code creates an URL like –

https://some-bucket.s3.amazonaws.com/test/image.jpg?AWSAccessKeyId=ABCDxxx&Expires=1572339646&Signature=someSignaturexxx

1 2	https://some-bucket.s3.amazonaws.com/test/image.jpg?AWSAccessKeyId=ABCDxxx&Expires=1572339646&Signature=someSignaturexxx

Here is the Postman response –

<Code>SignatureDoesNotMatch</Code>
    <Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>

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SignatureDoesNotMatch

The request signature we calculated does not match the signature you provided. Check your key and signing method.

Postman call –