{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x381d9c5bcd9c23e188d87e7fb5ba658a96a103ecfe0ef9788e986c59f00b5a66",
    "signature": "0x8502e2347942eb26a6aa499bf13b5af60d50905a7b89dcf1d86bc8bd194bcfa81fc296bb5b7d93cb20cec274717e3973e1a573f312188e0a0fc848047c5741ca1b",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}