{
  "manageEntity": {
    "action": "Save",
    "entityId": "729279",
    "entityType": "Track",
    "nonce": "0x3d94395092a0a4e509da37e53fe6f5c364f67e1d77e6e03c09dde413704240db",
    "signature": "0xa620e818ee068897d3d3db6d9e27ba6895d87347f2a51b7bd1bffb012a57b807628fe041ae0203420abaec1d7ff4277e916c74554e53178a5d897bfebf42350b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}