{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1861154779",
    "entityType": "Track",
    "nonce": "0x86c84bdaad6d2063d5baf22daa7c986449ebbe50cddc854dd34845b1d84255af",
    "signature": "0xd7bb3fc608ad7a364beb52298a4a27db0a075ec6886b973bf46c21381b415088018e7c349041094e043b11dc29327be683ccac625fe392b7b6f77cb5a3e88bbd1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}