Example of a receipt:
{
previousBoardHash: 'd8d9742271592d1b212bbd4cbbbe357aef8e00cdbdf312df95e9cf9a1a921465',
boardHash: '5a9175c2b3617298d78be7d0244a68f34bc8b2a37061bb4d3fdf97edc1424098',
registeredAt: '2020-03-01T10:00:00.000+01:00',
serverSignature: 'dbcce518142b8740a5c911f727f3c02829211a8ddfccabeb89297877e4198bc1,46826ddfccaac9ca105e39c8a2d015098479624c411b4783ca1a3600daf4e8fa',
voteSubmissionId: 6
}
A Base64-encoded string containing the affidavit