{
  "manageEntity": {
    "action": "Save",
    "entityId": "1110839",
    "entityType": "Track",
    "nonce": "0xd029427a3e984e21a8a621200f3d582b98961397a9a3e37ea7ede3bfc05cb95e",
    "signature": "0x8539dee2d2fe386752c4322a01d41e4004c8fccfe07f2c0579409beedd02d5f94f0e1af6c367c49d99fd899bbaae9835467b7ce0429c5a799f1753dd87a9c9131b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}