{
  "manageEntity": {
    "action": "Update",
    "entityId": "399833989",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf1d7d17d90c89902493a3ca082422051865fc164786b63ab2c3c51bfda7b280a",
    "signature": "0xad78b76295fbfbff45acd21186935cc32ec09fd75ad51c1b9694a3eea6a895a000ce32badee557b2347fd449940a0ffff79d630011231c334a3303985cc055c41c",
    "signer": "0xc01E15e34E41e38124ef8fB45B720120b80f4940",
    "userId": "399833989"
  }
}