{
  "manageEntity": {
    "action": "Save",
    "entityId": "1368371225",
    "entityType": "Track",
    "nonce": "0x364c523aca0c21d9d9c64686c44609d243867ba06d5fb2b5d6f4d18603d2c9a2",
    "signature": "0xd4eb879f935ab2972bbfef4c57bf30ff121ca75c9eb8868be790c781da05952960d0a0a23648bd605918e40aad0b1aa681f175acf6105fd1212bb8a92451465c1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}