{
  "manageEntity": {
    "action": "Save",
    "entityId": "812123824",
    "entityType": "Track",
    "nonce": "0x3f080ab1908ac9f9fb1da694d113bc1cf8470024e5198f039dba05d5f0f3267c",
    "signature": "0xfa459ec341f6231172304b4513bc3c0f83f839bccf6321797fb63fdb382b8e1645bd8f2a6e7c8c37e02c1767a5b93c4050d2477e977f7e65328ff4dbd707fb581b",
    "signer": "0x019ff76C6e9072A7b7ee22fC684b4B989b8ea3b5",
    "userId": "775276681"
  }
}