{
  "manageEntity": {
    "action": "Save",
    "entityId": "1298080630",
    "entityType": "Track",
    "nonce": "0x99d6641a8e30007625b1817d4609779819ed2e23e47c96109799a5f5a7e8552a",
    "signature": "0xba0bdf3db9475f0e6107ae7d45bcebeb27c9ca0f0e8b2e0a76f31bff075b7cc871c25b13ce66effdc053589358ee148f7504fa85c785da19c5190a7d385d2d911c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}