{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8b51774934a3e65e82a940f5d56e4fdc01dd878a76774d8910e7e29116fa7700",
    "signature": "0x9ee2a58193728b6c30e76a225b0b80a2386cc23d3e668af2f0e5c15063c017442da9c77a283f27cf45759a544d96ff9c1291f3c907308e441abf2cd52cad20241c",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}