{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "303667",
    "entityType": "Track",
    "nonce": "0x5c8bab18f8feee42dffba26ec338e767a6269702e0477b619cc05a2936775921",
    "signature": "0x2a6be715b8b31ee26d2a88c7962203e8bf0d02d3ec88cd3fd870185d9a057f7c409a61c2f5dad8f8bd91535a89b5231d669da30c943c1d5c67b22901f6f75ceb1c",
    "signer": "0x20eB8b6fa12092f80327179cAB99A35B40F151d8",
    "userId": "805166336"
  }
}