{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "266641476",
    "entityType": "Track",
    "nonce": "0x6308e3881aa9015c6cea43062eb3a918ffc629f1d6d2610e9ddcd2eb52b45c56",
    "signature": "0x37ae7e1134fa8bd20f5211e14f880900f7b5785fe9dc545161ae8fafe2a20f732d041b463f0462626b96d339e990e36ebdc6fa5e174cc9a3e87c5c3d38b068f21c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}