{
  "manageEntity": {
    "action": "Save",
    "entityId": "11784",
    "entityType": "Track",
    "nonce": "0x2ad17a6728a59e1fdc402b860a67f9fa127a65932621595cf898ee3a3076d69b",
    "signature": "0x809e8cb15411e9507976b14c22e4069fcc3bb2b5d5c32af04f0a1391cd4f96611ee70d8935e600955fb724c8288557ee4e5b93951650d8eeda5c015c859be6eb1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}