{
  "manageEntity": {
    "action": "Save",
    "entityId": "242884",
    "entityType": "Track",
    "nonce": "0xd123ee7c3978505e6694b3ef7b0faf92398e31993a88c7ca6c98606251df0daa",
    "signature": "0xdbe1772da9152f49d0e3633587a6d53761be6a47a3cfd73d29575f7260556dec65a86a2d2b70b1263ebe58949b909036b530358518ece59ee9f53113709749a61b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}