How do you store an attachment from a REST attachment url into a AR System form/record? 

Requirements:
1.  Receiving form on which the filter is built contains an Attachment pool and field. 

Set Fields Filter settings:
1.  Method:  GET
     Content-Type: application/json
3.  Base URL/Path Parameters are set to point to the record/ticket url
4.  Authentication section is set as needed. 
Refer to this doc link for more info:  Calling third-party REST APIs in a Remedy application - Documentation for Remedy Action Request System 20.02 - BMC Documentation  (see Task 4)
5.  Static Body and Request Mapping are empty. 
Response Mapping: 
Json Keys all mapped to the Attachment field on the form.  (not the Attachment pool) 
values|Attachment1__c|name        <specifies the filename of the attachment>
values|Attachment1__c|sizeBytes    <note:  this is optional but recommended if available
values|Attachment1__c|href            <specifies the attachment URL>


7.  Multipart Info is empty.