{
  "manageEntity": {
    "action": "Save",
    "entityId": "2079710576",
    "entityType": "Track",
    "nonce": "0xd6638ec37bf2d21ef3018b58740560625b9adf04adce4e9f842707a657a85b42",
    "signature": "0xe1d30887ce8b61549025b56e64a87dbed3d9b844c5a40afc8a784ccd306a0c52346bf40f2cfcfb475e18ac9de6706c270ac3092f8b2e1bcb9b235f83c11ad6b61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}