{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "950323",
    "entityType": "Track",
    "nonce": "0x45c50519deb5b8a0ed9b6aa5a412ca93caf743e65cf9486ef968847191848cf0",
    "signature": "0x6397847001e0b95c644b1e97871f2b0d9ff7f49d53cbb06dd6037684dbc084d758120759f2bf157ea84a64c4035a45f3b1f8f7cf6688db52ee49e2e769dbb7be1b",
    "signer": "0x2FBbf17ca409dDEb6FeA2766042a0A7cf2Ddbe83",
    "userId": "8223"
  }
}