{
  "manageEntity": {
    "action": "Save",
    "entityId": "1960597014",
    "entityType": "Track",
    "nonce": "0x877a51979a261ed0ca95672fbca2fbe53883c568034f6ad512156db6b34f461d",
    "signature": "0x75c75609bea54135d2cd26460d68a90bb5525149201f52d0b3f22ae691f93798657da79c8010c86aa388bb235b77e4a2ee3d7d4d59c510138c6600021ba930c81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}