{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "388681",
    "entityType": "Track",
    "nonce": "0x317ff6365eac8cde1d925469e144d8930eb9c98151004880a0e6cc609d9768fa",
    "signature": "0x7eebab7d3de823b121d6ecc620afdc39e7330988aac59d577855d467735e3d2061bcb357f35ee6908fb9703102cf69dd0c6547f1eeea8fccf5164394477539161b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}