{
  "manageEntity": {
    "action": "Save",
    "entityId": "146892503",
    "entityType": "Track",
    "nonce": "0x3d801b154b156438bfb6d491246d8680cc2b3805c5991f3c4659393ca3d6aef2",
    "signature": "0x32b8d5be3dc033e259068d8fc3efbbd34b518212e1a4476a52b39ec77761ab58122ead5c32353e305e1f355c551737cdc33f2d9f206fcfcfded4bebd1ef63dba1c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}