{
  "manageEntity": {
    "action": "Update",
    "entityId": "576467777",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5e3584037a300175d6d1ed9139fa9c1554df98afacfc0308cf94bc5c288d9562",
    "signature": "0x3ee257d8a525fab6cbfee7326fec5edb8214d7e2cccdd2759f03cff34465e3002a447cb0cbbcd8d15f00226811932894975c6c376eb3773a8db6d0e84526a2361c",
    "signer": "0xc51B6E9c071fe34c538E3330deC0e68FD87b81b8",
    "userId": "576467777"
  }
}