{
  "manageEntity": {
    "action": "Update",
    "entityId": "408485784",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd3502a83665468e0eb8d2720062188e225b9ba19b49fce65afcaf90a7c9f3990",
    "signature": "0x7946e9a1aca629bf1d73291d3048ab53e9ae1427392d1ec8d7c1935344a2221b5861917a8b47155a3ac09de9796a287b1f5a89588ec328741b81c6ead24f77d31b",
    "signer": "0x877fe927efF58e699cc6509EBF89b18c97151931",
    "userId": "408485784"
  }
}