{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089913",
    "entityType": "Track",
    "nonce": "0x3f30f0f2aa2b22e41bae84d05c3e5ecce63a56b60193fafa75b9fcd6cc695bae",
    "signature": "0x4926801caacd5e56fb0c387b37deab6f6598413e097ebdd18a2f8a4f5586598758a35592c2833f5d8382b494d94cda7843f806069fa70906587c7a2fa4adf7c81b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}