{
  "manageEntity": {
    "action": "Save",
    "entityId": "373097337",
    "entityType": "Track",
    "nonce": "0x6e11bb27482872486c0f64ead27124efe30e611b93196c9a18fa8a3b66fac5d6",
    "signature": "0x8593216169e5cb098338ab337e95f683eade33ae28708242acca342612734bae0ee993edce2d0cbf0443dfc40173657753546e403cfca569e6f9fb380f6e5f781c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}