{
  "manageEntity": {
    "action": "Save",
    "entityId": "352125354",
    "entityType": "Track",
    "nonce": "0x6546780ddb7c22948f03d17f7e33531dfd633c20ef2d3f9b1b2ab90d63c361d1",
    "signature": "0x5f17e95a2d52a2c284c5f6eef9edd8ca509e7651392faf634cda41f5d910b1e41761b342c63aafd8fa355f4a6f80392748428222cb932753992e571766fc68321b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}