{
  "manageEntity": {
    "action": "Save",
    "entityId": "263336894",
    "entityType": "Track",
    "nonce": "0x61603309f0bd908685a6d726a4d489e6bf8974b0778ff82fa1f1fbbe2b466ae5",
    "signature": "0xb1774967dd33ce3938f0d986db0d9869e92bcf553b82637823da0d14ab5d929e7aeadd57f8cdca43ffbc6f6020b6476eea9031689c88deefec72a10078e2f79c1c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}