{
  "manageEntity": {
    "action": "Save",
    "entityId": "1390477349",
    "entityType": "Track",
    "nonce": "0x3e6b185a46305c56118965a13a6ceb14bb96a33dec19ccf1fcd6960665a918c4",
    "signature": "0x297797f2b1532765a29f61673455e5b037b0aa9368e2649fb6b61bab64e9c863332a94e577989e4e4ce3162c09e1d8f2c848065923b5d68fa625c43a219389101c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}