{
  "manageEntity": {
    "action": "Save",
    "entityId": "475410913",
    "entityType": "Track",
    "nonce": "0x1bd8a5449c500a348e6f768f3bb9f7edf9a600bfb47849294a109d63d8c1c9c7",
    "signature": "0x6eef81bec6bc5c63fa3ec887022d951e88a4934ba428a1af1ca0f38ffc3496077cad50a6a980921df3a40caa75fa781d95369b070315fc5364c43e1cf4e3c2aa1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}