{
  "manageEntity": {
    "action": "Save",
    "entityId": "1018739",
    "entityType": "Track",
    "nonce": "0x789353847c905f1ffddc7fc1ea23f3bae27289261f43df0e5e9f38f2cbb09b82",
    "signature": "0xf5bf02a8b731bbb389ba74e9157a7a5a3b4be833875750ed7403babba11531db3c147d0ca53a67390f6be986846abee06008d247a8e0c2ffc5e3098333646f1a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}