{
  "manageEntity": {
    "action": "Save",
    "entityId": "846768958",
    "entityType": "Track",
    "nonce": "0xfb506b7cd700e1c9f223a45f93973e12d9a7f0e38dba3121b845096ea6ab3785",
    "signature": "0xfe6c55d5a145cb49ea522f343161cb84871e41bdda994fa024dfa948a9f4e4947d84eb0825a7df0b147f148b0f39bc5e6c491b404fe8bf30a6bd353486b9b81e1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}