{
  "manageEntity": {
    "action": "Update",
    "entityId": "448697058",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf98013961b3e97af34a3cb911f88b9f5a8d50564700c989fd0d89eafeeaf0341",
    "signature": "0x8b1105f25b6d0a397dd70f5b374499f17ec518517c4e422d5968915e75e06390762e306d093ae5bd7802e7aadf4c6f192a20ca9ac8c676cb7e22bece316f8a281c",
    "signer": "0x53d216C674F2a330cE48F25b556d4339bcf6515c",
    "userId": "448697058"
  }
}