policy.json

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Sid": "upload",
			"Effect": "Allow",
			"Principal": {
				"AWS": [
					"CUSTOMER-ARN"
				]
			},
			"Action": [
				"s3:PutObjectAcl",
				"s3:PutObject"
			],
			"Resource": "arn:aws:s3:::MYBUCKET/*"
		}
	],
    "Statement": [
		{
			"Sid": "ListBucket",
			"Effect": "Allow",
			"Principal": {
				"AWS": [
					"CUSTOMER-ARN"
				]
			},
			"Action": [
                "s3:ListBucket"
			],
			"Resource": "arn:aws:s3:::MYBUCKET/*"
		}
	]
}