{
  "manageEntity": {
    "action": "Save",
    "entityId": "831288861",
    "entityType": "Track",
    "nonce": "0xc972bf04c10bf06c5a1c989e43939782b5a289d5e2cf622a38c68f9690376b55",
    "signature": "0xf92dca1091e1948632c302459abd849a49fb63db1536f50ff9351104741b30755ec5850417eae523a431950d97d5b01ab74503b5b6a0dad118106c664f00561e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}