{
  "manageEntity": {
    "action": "Save",
    "entityId": "1014989",
    "entityType": "Track",
    "nonce": "0x4c20690a84555a95f500927729727fb389bb1d64bb069912a7612019b525a672",
    "signature": "0xa1649fa02e9190f65851b0d7134a4479909c189cbe91ad310e88d4c8d8aebdd02062af2b0b8455167ed16732dceae82c8306f1fc30520ca9456570e553415ac11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}