{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1511050603",
    "entityType": "Track",
    "nonce": "0x62f11c4a475a805272e23256e24bac73e93a9d98385afb5cfc6572040c6edc26",
    "signature": "0x4bcad368933452c88b468accae8e142f2a3ce4669fce899a5fd66f524a7bf08b4d84bb65d9c8e039be24c0dd26135dc95891eeaca9daf2e574118baf0e94b0c81b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}