{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "163391",
    "entityType": "Track",
    "nonce": "0x3d2e77fe4cebfc673efdf62b014ee7b3107614bf7af82f61b2fa8ad1527ab72c",
    "signature": "0x009b493265a5290cf1c68824b1a530283bd716cb9cd1ff37d016fdbda14fb12c37dc5a809e39ac8a84450fb0f812999f38b3d294cb08a7f57bc536ea87774abd1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}