{
  "manageEntity": {
    "action": "Save",
    "entityId": "351793735",
    "entityType": "Track",
    "nonce": "0x6031018317deff027307763c348361dbee22dd240602c18e7ccdceda9e228a08",
    "signature": "0x7a0e5a374a4b3909823f6afadb4e4e8db0f76e1aa77fc496488faa426ac128346d08b1a8ba1eed7d3e11f6fb40adc18055fabc6689907dff115ba139efde06c71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}