{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492072459",
    "entityType": "Track",
    "nonce": "0xe329137b2ad7019e4231270c5d21af6e78fd9b09c5fda86194689d25642a9697",
    "signature": "0x3fd4a9c95f8f08f6d03cef6dc38a5de8cd8316ae2ebf9e1e09e58a08a0712f906aa2d7044999d261024560f8ab2e762360843587e8e8395cfc858ba722a84b4c1c",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}