{
  "manageEntity": {
    "action": "Save",
    "entityId": "880932117",
    "entityType": "Track",
    "nonce": "0x1c8b36d5ee7c27e3d2cb9c8717386611b20c4804555c321c6997e900188c74e2",
    "signature": "0x6c8345874b70edbe41b55e4a5abe52655d74acdee70754a0a59e0bca687548693bb6a671c8da2aa033507d12eb08fb1cf103356d10d979179b58a6817a0db30c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}