{
  "manageEntity": {
    "action": "Save",
    "entityId": "380636299",
    "entityType": "Track",
    "nonce": "0x9275c6a6d646ce3e5b0c375ae18ed9e926c61a27a8a33e4e8c1a218120fd60f2",
    "signature": "0x7c4ab5008ee71b04db56d7f3adcb132bfcd2c187f8feb14a4715a8c08987fe5d21314ef5083db882e1e186885805947344c67883eb31e83910ba8171b17fdd561b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}