{
  "manageEntity": {
    "action": "Save",
    "entityId": "411611",
    "entityType": "Track",
    "nonce": "0xb51f82dc113c5dfbfc4c30bd08948b06b36e878872e208bc3ad333b884e253ed",
    "signature": "0xda411b6020b4af485dc5a6a76ad4e5fb713a0b0edfe6518389cde2aa39f997406709267243c3b7d17fe58d36a5cb469a0d0dffd7754ca415fdaaefa591aab0001c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}