{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1657000883",
    "entityType": "Track",
    "nonce": "0x29b3586c9cdafc68fffa7e8020057aae6d284019d5d9db987767d84518b7e96c",
    "signature": "0x274dbb395b6db1b63d6b60522506991eb7d5cf3b04baa82ef4bfa568ead8b3473112416a016d6286e44c8618f12ecd08585e13cc21155d2e3de984c7fa2d1bdd1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}