Property name	Value	Description
id	integer	The ID of this right. This is a unique identifier.
type	string	The type of the grantee. Valid values are: user group invitation anyone
role	string	The role granted by this right. The following are currently allowed: owner writer reader
name	string	A displayable name for users, groups or invitations. In case of invitations the email address is given.
email	string	The email address of the user or invitation to which this permission refers. There is no email field for groups.
avatar_thumb	string	A link to the user's avatar image. This is only provided for users, not groups and invitations.