{
  "manageEntity": {
    "action": "Save",
    "entityId": "1069350030",
    "entityType": "Track",
    "nonce": "0xc574268b8ffd06f996f0fea2d892dca409940c30d32020e3e683ced832000358",
    "signature": "0xc131665c19755ea45ed1247e2d44ea0487d6b5b5ddb10f1ea1082e2556099b8127088f0c465d3f963ff227e0fb8acb5bb962b1e00c13908f7f1d2a010c4518081b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}