{
  "manageEntity": {
    "action": "Save",
    "entityId": "1209829332",
    "entityType": "Track",
    "nonce": "0x493b2c4cb81b185dbef03f78c6c0e02a120337c9b176a8e2171c218597f34461",
    "signature": "0x8a5f2700a186277126232901232869849bac1bc4b387018a27fc008ea58ec7a93151edd64d3daa1f7c449df71034c5d396822c94b7511b225037d05c56f5d7481c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}