{
  "manageEntity": {
    "action": "Update",
    "entityId": "318512883",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc518677277a44d0dff12e8f3967e612609277974e5181349e07ce76d05c6d3b9",
    "signature": "0xda9c50dcfb3dc28fe3e3ad1fa316b4125ef1ac6843ac179a1e76f4a7e2d8274f4ec6718681f35458b47868fc248a600162a5aa358fafb35041370b8a10249f411b",
    "signer": "0x12E99fdA952cCE832a33a61827c5F498BbDA0aE9",
    "userId": "318512883"
  }
}