{
  "manageEntity": {
    "action": "Save",
    "entityId": "1198938673",
    "entityType": "Track",
    "nonce": "0xa7dab8e5d16ec8725674db904ef571db9c880eb95433fdb99ca3bab588eb7f37",
    "signature": "0x71fad522b50967ee8dddfec50a262603c770e8ed343e543ca9a03fd58139d56f59de5032a1762a732d658297f2cd5772b149420f49570690264259a0f77d512a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}