{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1521436194",
    "entityType": "Track",
    "nonce": "0x5667878b83ea64a6304406df3d7744fa9b9ebab0b393f4f1fe5168dc55af3136",
    "signature": "0x7ba05f4f8f314cde71a0787529051d97618fe9e7d6465c8bb93bb7a4ca24923c3a3ab7d6b49262512e9eb7f955bad897f0045c6778d090d2742eac5ad695f9db1c",
    "signer": "0xa7CE3e71c538F5C6309059E7Bda968883229c85c",
    "userId": "341099691"
  }
}