{
  "manageEntity": {
    "action": "Update",
    "entityId": "687643431",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9e1cfb97c8ca8cac39014ab0a2b507296a689e713be51c31d9f8b1a982632fbe",
    "signature": "0xb52d29f17d662522a57f342e464d1f4377c20868ac43017e82b3f20d5c0a2fa60620581591d5b3927d07cb3b47b5481016ab3cf696a2905122b4475fcabf68541b",
    "signer": "0xDCAc8DDEf09a631FDF87e21cE425B1AcEAF5B300",
    "userId": "687643431"
  }
}