{
  "manageEntity": {
    "action": "Save",
    "entityId": "1933370968",
    "entityType": "Track",
    "nonce": "0xe847b07e902fbf82a836a0a43ca06026d706986bf9479de73f4727f3a43d8549",
    "signature": "0xce1def0d5497f68cd3519c9f73a45440a1754eb9314ac1b5ec5ed624f4024712291d4bf1123bf013ea752b692db7512534db23da79b157069bd38ef47cfe6e341c",
    "signer": "0xA59019D8b271B1fC56c696FAB98A82581d424Db5",
    "userId": "46085"
  }
}