{
  "manageEntity": {
    "action": "Save",
    "entityId": "194567868",
    "entityType": "Track",
    "nonce": "0x64d11352fe81ab58c033a2720a86fa4bfdd4a24a8de5518a6e85f301a37a7c9b",
    "signature": "0x35fd192d4ca1636242c30cb43b05ad189bfebb6bb570178254bc563f77ca1f35785416fd803e86b6c6719df3d83d6449a600465e7d166005bdbc73eabdf1750f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}