{
  "manageEntity": {
    "action": "Save",
    "entityId": "1248243505",
    "entityType": "Track",
    "nonce": "0xa3f8c2f326cb5891085c7cf9d18352445b93cef427a81ac427cd33988e5c4663",
    "signature": "0x6a55e4f791993a8dd3755256549268550325d716bdb1f268e0d68f9dda5e209c132e192484f69464156000c9d8c7ab389cdd9265d8b3e222d8cc227d8f8d27b51b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}