{
  "manageEntity": {
    "action": "Save",
    "entityId": "873877654",
    "entityType": "Track",
    "nonce": "0x7633abd54371b27a215f0dc527cba5ca05885abed7b07270f9f468c0d45c3859",
    "signature": "0x5dd93b3d7b0ae3fe659e92d509e6ea8a9cdb0ed5362141014b54b3141df521dc4037de56a750abdf9be7377ab3eb66a4886e9d65c9b8009cd820127e21402d9c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}