How to handle multipart/form-data with different content-types?

How to parse multipart/form-data using Spring framework which has different content-types?

Content-Type: multipart/form-data; boundary=----------287032381131322
Content-Length: 999
----------287032381131322
Content-Disposition: form-data; name="control"
Content-Type: application/json
“deliveryInstructions” = “file|deliver ”
“fileIdentifier” = “12345”

----------287032381131322
Content-Disposition: form-data; name="targetDevices"
Content-Type: text/JSON
[ “12345678”, “22345678”, “32345678 ]

----------287032381131322
Content-Type:application/octet-stream 
Content-Length:<file length>
<file goes here…>