{
  "manageEntity": {
    "action": "Update",
    "entityId": "337210858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf48c976935eab4c9b20311de5a3c0348eef47c57da428d3c2a0c500f1137719d",
    "signature": "0x64fa6fe16c7f006f996c946647d8c19c3de396ee77ed552828ddf19e084cb1f240067b2baaeb9742bedfbf6311025b739648b70bc100fe470436ce463ee41dca1c",
    "signer": "0x48c943B273D3e38E9AD42B75681E0A6A29173aFd",
    "userId": "337210858"
  }
}