Signature used to authorize movement of data on behalf of a private-key holding owner.
The time in number of milliseconds since midnight of January 1, 1970 00:00:00 UTC that this signature is authorized to move data.
The public key of the authorizing party in PEM format.
The server authorized to move data. If this is empty, the signature may be used by a server to ask for data from other servers.
The signature of this object, having signed the object, having been encoded in JSON with no space or tabs in ASCII sort order, having no value for the signature at the time of signing.