{
  "manageEntity": {
    "action": "Save",
    "entityId": "800370",
    "entityType": "Track",
    "nonce": "0xf70d564a83412f35320cc68fc5fb8f685a758e02716f9f77bd46c6c4a79fa739",
    "signature": "0xf703a0b35bae11920158326e98a56bebd1ec4095cae6868b3d25c3ed146c59e12b5856978fa1dae11d7b1b358a5570a0824adf546e5be5c833c34134139fb2d41b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}