{
  "manageEntity": {
    "action": "Update",
    "entityId": "819923462",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3d31b76a1012e213260ffaf21b8c9a9c7522124e0fa603acbc285604ffd9b667",
    "signature": "0x555bd41732689633acbf46d0db15a8075160dd0bb1ccb1fdf0efd58c3070052150cb21a08e54fde709cdb8ad4cb41cafe57b94443b38135dc22b4068798fb3f51b",
    "signer": "0x4e052D276A52D867625DaCF8a3e678436885b972",
    "userId": "819923462"
  }
}