{
  "manageEntity": {
    "action": "Update",
    "entityId": "193463567",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x490f8b5a1f19160ffe83af32e70e43678c8a905f5319c7a1afc3153e60d7de78",
    "signature": "0x669225fdf658f18fd31b5a5ddb02090286c883bbc003beb11e6c6d573234883d59e456d54b46f05044f17fe026d6b632813514486cf56008c4e8187b65b5f1d81b",
    "signer": "0xa4DC46FCAD6f12C17d6901fADb3826C76aBF186C",
    "userId": "193463567"
  }
}