| authorization | AWS IAM Auth - Document, How to create |
| x-amz-date | The date is specified with ISO8601 basic format in UTC time zone. The format is YYYYMMDD'T'HHMMSS'Z'. It is required for signature verification. |
| x-amz-request-id | Unique request id for every request. This is used for metrics and debugging purpose. |
| x-amz-marketplace | Two letter country code. ISO 3166 standard - https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes |
| host | This header is mandatory for signature verification. 1) If you are using the library mentioned in the next section, then the library should take care of setting it to the value of domain name present in the URL. 2) If you are not using the library, please explicity set this header to the Prime domain name. |