{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1871418388",
    "entityType": "Track",
    "nonce": "0x3e8ca8e74a34c0bf564ab89c89920a4439b30481f7c28ed85c2ddf8640193318",
    "signature": "0x290d64da72f7f4b0c80e678b924cfe709c2587c921e219151f524a67b8bedc6941998e5dd055422dfc956e13c366fb04359352ff6fd0e41901db4481d2b8627e1c",
    "signer": "0x4cd4EAe6AcF1d2fa1Fd61eAce803597613DbaD92",
    "userId": "114543"
  }
}