{
  "manageEntity": {
    "action": "Save",
    "entityId": "377176",
    "entityType": "Track",
    "nonce": "0x247457e5078341e8163624234b5ad85d05142fc019576b270e1fd94d93af1299",
    "signature": "0x4b4941d76886cd27718f97b4a12872160c1390aa7cc15806139d90c84ae74eda6c0c7a53641ea6117e7aa96e009ce06bf8865c6cb35d029d919b777542dff0271c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}