{
  "manageEntity": {
    "action": "Save",
    "entityId": "962633064",
    "entityType": "Track",
    "nonce": "0x24b5d212a5e40a9ad29304ef5e42c50f4522c51199c2f739ec0afc4eee281e51",
    "signature": "0x69536972fd7d1505f34f9f2b196fdcf93100eaa90d1d3775a1ae56edf04234d47d2ce458d1fd2372b767e91b04b89dc073a1097e3236ca13e82b0385e44e00fd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}