{
  "manageEntity": {
    "action": "Save",
    "entityId": "1542335732",
    "entityType": "Track",
    "nonce": "0xebebd19d2bc754ba0e9590dc1ec9cd82d05529c28e557ac3295f4d0949ded2db",
    "signature": "0xd485bd5cefed146e39515534bace8b1a6e9f010ab571a4546f9972b695ab1a8e021a8069aa7e65f0ea6648b996d017143e560f90b9291950e3dce99e525af0131c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}