{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1493021171",
    "entityType": "Track",
    "nonce": "0xa24fb7871ed2be8ea23b91bfdc28bc378a32c49d8d47e1488a58f60989d8bc19",
    "signature": "0xd678912c45c6a665c2af6a4348ebb07235bcd16e5c1c8252429326949328c9af24bea9414494b1b24335353506813177ee7cb3311cbef9ea1962e420b2af30931c",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}