{
  "manageEntity": {
    "action": "Save",
    "entityId": "464820618",
    "entityType": "Track",
    "nonce": "0x4396c8196738acb096f3536bf30497666a420c47f7cc2179d84970aa26cb4b5b",
    "signature": "0x94aaf9a9ca489067a2e734ace75c8177c70eec65e3509d38bcac171abc6e03a44db9ec17051560cc3c2e070fe77094753f31621343ae0324e8a57be70c4444ff1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}