{
  "manageEntity": {
    "action": "Save",
    "entityId": "1661628302",
    "entityType": "Track",
    "nonce": "0xb1f36acee203f6ec19fa7339e061d499525ce1b7e4d990665e43d974c2566bb5",
    "signature": "0xbe9a541f32faaf359468f645496ed54c41caa9682fa45abe0de32fcc243bf3671a552d43297f979ab71eb23a8916e275521796e7d9cde7072ca15e96fcaa1d471b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}