{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764956305",
    "entityType": "Track",
    "nonce": "0x35c45cb5c466261899934a2e6425d1caff97af688e8a1cff1f55faea95766d04",
    "signature": "0xd4b13d952d2c7421c50990675358c6797ae6991dd414a2c708a78a7cd7ee7c403e9f03b11a2ebb5f2185f8ab69247c8a9764564563074e56bab6c32a4c2915151b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}