{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123243",
    "entityType": "Track",
    "nonce": "0x0ee2672bfafb542c0b84a947acc7522656b0a0df37737c666c14b84c0e7de8a7",
    "signature": "0x5d93e67bb9e2ff0d488fafafec694db50c336adad2b9742a0705b7f3777fe8bb48a6ea7df6f3d3652c6f9f57b0820e7913ec0bd86e8257e00cff124d9fce565b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}