{
  "manageEntity": {
    "action": "Save",
    "entityId": "135423381",
    "entityType": "Track",
    "nonce": "0x6c5dc9cf10195e1b0e5a0a86030ad36b2e2b0ef357daeb164eb80effd23f46c0",
    "signature": "0x75bd0af73e5de4c27a283711d95524da566ea60f396ea166f3e9aeaf6384cff641e88b81ba21f1abcca8c8473c576d2597df011139e0b2a1ddea5041c61542db1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}