{
  "manageEntity": {
    "action": "Save",
    "entityId": "824612741",
    "entityType": "Track",
    "nonce": "0x290fe51013a30d634633200738e49812c0f8befbe5524921d6f548310fd6f8b6",
    "signature": "0x520447df608b0e91e6b28f1112b895cae1909b138ae1be9d43c000345932d3eb2e9ab883a311ada69524367a5fba045ac6c43c95114a77b1bf3ccde912ad18bf1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}