{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124335438",
    "entityType": "Track",
    "nonce": "0x95454eb8ea610d2ee722ac60800b92cbf20683ecde817995460a9453c3b1aae0",
    "signature": "0x1cb3d9cbd75860301ef031b298883b2394eedf09fe408a09f23863d90b620254661dccb1804ae8007a7fb2477230b44adeb34b9027840f39ccc72bb8ebdb89a81c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}