{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "321573470",
    "entityType": "Track",
    "nonce": "0x2c6cbaa4e654dcb0ab4c404a178124544ce5e4bca98827ea704b0731718f828c",
    "signature": "0xde0b6dfc665c1605daa17b92ac18fddbe355acbb2a577e6cbaebe9380b94293a273bc9f599eb8fe6b83d8d7a7b10ef2d39fbe695846ec265939f027763e1a1f81c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}