{
  "manageEntity": {
    "action": "Save",
    "entityId": "1553729866",
    "entityType": "Track",
    "nonce": "0xb17ef1efe8ac2a2d0e4b10a3b84b870058f4c2e748dd01a86eb4270396d37ec8",
    "signature": "0x57654c9b561bf6037a59e6076009d459889e28762106a098fd599e924348f4051cfc8e6f6eeff7c11cfbd0fa5f1413423c644801006786fe6f029119994dddb61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}