{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "565870",
    "entityType": "Track",
    "nonce": "0x591a4c46ac7b21bb6f93cf671affc497b7b932a2738053346ee1e55d7d429a7c",
    "signature": "0x517f0e70f41cc84aa3c07d82f2a3f23b8472c8112c21ab88def2593bf28753c76677c182e6d51a9c7d32f8443395eb1bef0d18205dabd4e75b57f2265f46ea241c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}