(registered 2015-01-23 per RFC7515) 

Type name: application
Subtype name: jose+json
Required parameters: n/a
Optional parameters: n/a
Encoding considerations: 8bit; application/jose+json values are
      represented as a JSON Object; UTF-8 encoding SHOULD be employed
      for the JSON object.
Security considerations: See the Security Considerations section
      of RFC7515
Interoperability considerations: n/a
Published specification: RFC7515
Applications that use this media type: Nimbus JOSE + JWT library
Fragment identifier considerations: n/a
Additional information: Magic number(s): n/a, File extension(s):
      n/a, Macintosh file type code(s): n/a
Person & email address to contact for further information: Michael
      B. Jones, mbj&microsoft.com
Intended usage: COMMON
Restrictions on usage: none
Author: Michael B. Jones, mbj&microsoft.com
Change Controller: IESG
Provisional registration?  No