{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "494223084",
    "entityType": "Track",
    "nonce": "0x18fd7051283462414258cac753f19c293c38f7c4d6f1ad9de00b2096dcdef2b0",
    "signature": "0x3d8775678d6b521dd4cdad1fb49fb97bf75ad5c9998f03c7de8a06bec763f9687a8df6cff12dde95bc646b2abcc7fb0c3baf9d5024e477319eeac6c12403aa271b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}