{
  "manageEntity": {
    "action": "Update",
    "entityId": "21603383",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf9db5adb4bfa8f308e5826194338ca98e772da793c8bc81fd3b5246cc42b7059",
    "signature": "0x83bc480ce3f58835c37392f5cc63d9e3bf49fd94f24200fe0cd146c79ba9ef4f5ea59576f93d0890859205ce9376f6c3e14ad83f2950f2d099a5c364a09cb9d91c",
    "signer": "0x4ac23dCFa73270D0cdFeE7D7409959255f83fac5",
    "userId": "21603383"
  }
}