{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "280715729",
    "entityType": "Track",
    "nonce": "0x1991a389619133f93cc332bda588444d42ef203fdf54f39e12e9002e0808879b",
    "signature": "0x3007a29afcc351bfaf3992389de80987550a4c41f858d3a87a32d3159c46416b643bb71bf3a590e73fcb00e3b39b108cb146d34eb2fdd67a7c70b70eac75979f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}