{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "558188",
    "entityType": "Track",
    "nonce": "0x456fb123360e4d31da9cbc294d11ef7b6c9fe13976a7843fccd07d9025ec9bbe",
    "signature": "0x1f9e7e7f462c56a5d40fc97327dcefeeb7f555041f44071a8d4bd13bd963a0ed46f7fa1c7a7592f5c17e9be1924274de5f69cb6f6dc201e7ff21936295a29f6c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}