{
  "manageEntity": {
    "action": "Save",
    "entityId": "854762",
    "entityType": "Track",
    "nonce": "0xe7271668fcd75a277ff4f38cf9e1d7f9d9964f0e946437313e21633ba3aa93bb",
    "signature": "0xaaabb5f9ad7bd603f3dd37883fe5517418e5a1ad5b6dd599dde3f44d79c40c3562dc60f4bd9f5450815e89a4b9d783756296b829aab1261b3996666e1892d24f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}