{
  "manageEntity": {
    "action": "Save",
    "entityId": "322280584",
    "entityType": "Track",
    "nonce": "0x8281b3c904d15ebbf73e934e67790803ffe238b6c6a477409041c87ef7b63ca6",
    "signature": "0xf2518ee916f66333992a4e865ed227ebf2cd6521106227ec4d4525041177c8a3354b42347f3be00f169ae0d0c3490cc96ffe9a5343c1cd2a0f408d408f0b3b2c1b",
    "signer": "0xbA83b3D0645C0C99c76cB296B0BA81bD641DB81c",
    "userId": "951995708"
  }
}