{
  "manageEntity": {
    "action": "Save",
    "entityId": "205478147",
    "entityType": "Track",
    "nonce": "0x8b0b6dd65fe60b40983044255a8325702e3bdb2eeb45ccdfbe37ed23d52ebc69",
    "signature": "0x86fbb06d28fa64b2d74d7906d14e94f96ec90024952ead27be346896ca969fd527e90f62968f4a4371fd9fb29e25a9cf599329d48c6f7e3f89021a6c5ee6e0f21b",
    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}