{
  "manageEntity": {
    "action": "Update",
    "entityId": "197430922",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc334a7f42a1471d6059a45038980ac25d8e78831babb4280e44b700a305e4e4f",
    "signature": "0xd5a6f7d78cb9b294f0e0387fd0dfe78b31238ef0e3c82439e396370c1f29c7d70b4fa3eee8b8ef5c8d9a939f2e6022c02e848b3edda9906e9aefa0ee7c9d9ce71c",
    "signer": "0x306F12d5f97327a8099a74CdE3603214150d7e5e",
    "userId": "197430922"
  }
}