{
  "manageEntity": {
    "action": "Save",
    "entityId": "1658593782",
    "entityType": "Track",
    "nonce": "0x72ff692d6db0a329440efe1973d764540a193b55a5c3ad1244d1b71df2e4107c",
    "signature": "0x2640139938c6a258083328782f0d18d1f54df2bab406663338a2fbbaea3fbb6346d38d6d462bbfe7196c8c498a9654a5a12b6d70755a37bb8a23d54a39a24ce01c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}