{
  "manageEntity": {
    "action": "Save",
    "entityId": "1627212511",
    "entityType": "Track",
    "nonce": "0xaf11d33f59946b819798e3bef89f58d6e511ca2e3dcc46fe710f871160cbdf37",
    "signature": "0xc8624b3181433554bd06d480a6e50e31c0dbd0c0c653885edcd3bdbd136f065c3709725467457913bbd62359f9a340e773782553b1a45fe369855276d48053e21b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}