{
  "manageEntity": {
    "action": "Save",
    "entityId": "1865085077",
    "entityType": "Track",
    "nonce": "0x293eeaa8874237afe365fe8d5b7ee119b8623c855112171ceeeb0945556962a1",
    "signature": "0x24266a58df21caaa13bc45b2876f80593f75551b355f83b3de11c51d939df085773ccee57bc64d14bac0aadcbf83f1d0ad06cbfbe9564ab57ee1fd6301a21c161c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}