{
  "manageEntity": {
    "action": "Save",
    "entityId": "598992162",
    "entityType": "Track",
    "nonce": "0xb18af86602e2ab85206b94ceffc6731a02e3f604fb36769b51b35589e7a6744f",
    "signature": "0xc2173a78e3e963772cfdbb1d308c567eb07a7b46f2d695a8ee8942aab508e58618f6df5ffc1acf43a33d8aa51d0c1c678caa57b21a30e7603837b0debae221711c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}