{
  "manageEntity": {
    "action": "Update",
    "entityId": "505182311",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x73cd82028b3287cabb43f8224acc943f5810874ca230bddc2c604a78a51789b5",
    "signature": "0x4980e58ff065b8b7c45726d19e8b681343b47be5777d4112d3f9d2bac9b321df3345289aa885162c6f0b0991adf2cf95739b253b43aa55d92fd58b07fc788da61c",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}