{
  "manageEntity": {
    "action": "Save",
    "entityId": "1473381650",
    "entityType": "Track",
    "nonce": "0xf00d85234ccdf51e189f96ac683590918e1518eee20711a66fc57c6845753a9b",
    "signature": "0x1212e0dbe780830d5aff774c5284db09e0d2c2214427aeaecffde02738e9ed0f69a1152eda86a68989a6bc5b2605b8d30a030660e085dab2c1fb79d8b5f711301c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}