{
  "manageEntity": {
    "action": "Update",
    "entityId": "209707164",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x902adaf50fa5a5afde88a0834916719f08a205f54d6bcefd7af7215f036c020e",
    "signature": "0x7c1cef943d4fb0b9bb9e76e5eb06334a440d152872d2f25291af7e331d8c26c54e08e901bf6225cef1c4f52e40dbde375fbbf300821d99823d5faab81e783fdc1b",
    "signer": "0xa9C1a2BDeD896d3f122E366aB647BF1C74C00eBA",
    "userId": "209707164"
  }
}