{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618371886",
    "entityType": "Track",
    "nonce": "0x8c4b9212a58ff8906b294a4eea3503936c0212a5da3397eeed3f6f926a824615",
    "signature": "0xa90cb29914bfe5cbbce30c9fea66ff02357b93720ac031cf1796ead5a7bc5f1135e392380f7ee234f6b94356e8f3037d140746634e78b82fc5ae2481e1bb5cf71c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}