{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "698134175",
    "entityType": "Track",
    "nonce": "0x0703c8865bdd58c2c87e00ce36a03d7b96aac868e2be62496c1701af92be4d31",
    "signature": "0x9f41efb718ac25afb3fb9775f4e7f1861bb8dfe66f4ad9b32e243f5351dd042968fad171ec6ecca5219152813bd7dc72a95ca3ec144a77dce7e697961ee42dde1c",
    "signer": "0xf773bf89dB210A6Abf186d75FE268A155c9C0358",
    "userId": "752319628"
  }
}