{
  "manageEntity": {
    "action": "Save",
    "entityId": "325378",
    "entityType": "Track",
    "nonce": "0xc044085447d69de73911d5bb08845a2a81f39843cc4c45d0926ea67269256fcf",
    "signature": "0xadb49689717f3b77153a949909e794cf3ed920a36dd4fc67ef94261f39efa53d4e7d70e8486e97fb95bec171cda691625200d854eb011fc67e355aeb03ed91f61c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}