{
  "manageEntity": {
    "action": "Update",
    "entityId": "438603442",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x19d46262b560d82667f7150c638b8a6c6b358ff2791fe00f886365c207e5165f",
    "signature": "0x6f478004215728f5b8e9916e7398842c53af07046e3b241df2c0ca49b80ceec83c72dc1f4bab5fb97ad0dc3622369ac75b3161663251911709fcd11a429279a41b",
    "signer": "0xF695E1Db501CE40f8310106d73F9a610112ccd7E",
    "userId": "438603442"
  }
}