{
  "manageEntity": {
    "action": "Save",
    "entityId": "1537230282",
    "entityType": "Track",
    "nonce": "0x2d2b7cc03ea482bfdfe75384b0d045ac63cc99825a6f2608b07a00757fc13273",
    "signature": "0x1a693c043076f4d6d562f7e0971194d943487c77adf1ac0a23a5582eeb2e9ae465a595f2cf46185604424bfc13b3ca564150dab805127893126883780d5083551c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}