{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969330662",
    "entityType": "Track",
    "nonce": "0x5ec4c8f6ebf7d21f7f5e2093379c92c5d8e57ba26440acb05656fe429817e472",
    "signature": "0xde31f833d10778761702cca369e0c5b84a0db3a89608eac9eef01bf87948f0985a7a4645a629bd742482e2ab705a4b317fa8602fa82aa8e5a68f5c87bd0eadef1b",
    "signer": "0x2f890F488c7DE6221893B82B90bea73E2304cE3E",
    "userId": "344578316"
  }
}