{
  "manageEntity": {
    "action": "Save",
    "entityId": "1151584446",
    "entityType": "Track",
    "nonce": "0xdfa69228f905ddca4b7b39472cde3dc9d03790215028ba5a8c279475ac2a3963",
    "signature": "0x1025044efcd48a7a63125474f22f734e063ff3d90d5183232faa718247400f5213f65074cef3c54c915c0c2e982917ece21c297885a84eb3f8a37378e21ba1d21c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}