{
  "manageEntity": {
    "action": "Update",
    "entityId": "390123561",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0bbf716f8ec52c95dd826f3df72ddecfbe87139322df89293858eb215feb9285",
    "signature": "0x1672e57a5ba9ab97d8769435a9d6f53d31589b14394768b0994b3d34b36888a334de80add04c954eb483282ef8bb7298e46dce9036333c3ae0abe25a8e892f8e1c",
    "signer": "0xfd33c3C0a3a0b115CAc2419a0B0c71F89a7d29aF",
    "userId": "390123561"
  }
}