{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1394899418",
    "entityType": "Track",
    "nonce": "0xb33692f67212559f52cb2a4f4232ee2205f8b4ef45d74ad9a6f1562ec076f06e",
    "signature": "0x39cc64b2e11c04d85ab6b005513803ce4e55a4bc6ae57a2a4879443a028bd3546d60a30a95c217904acbce81f15d5488c6505effb800317b88b1eb47a7b504e61b",
    "signer": "0x8D4435Fd18F8E4D969FCB3b38e10372302841e44",
    "userId": "595763143"
  }
}