{
  "manageEntity": {
    "action": "Update",
    "entityId": "392916852",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xec209484efcc39af307039108077a357e04741697394a7ad4d1205b7f7f786c2",
    "signature": "0x943250c494de54cf6ccd63df54a0e577c52604680292968d076d769eb0fefa337c6e02e5406dee448c0cbeb6dd5c0e241a009fa8f43ea9bf77f3e91176acd0c11c",
    "signer": "0xEF645db3505402bb23edEfe2C059199A7782Ba9D",
    "userId": "392916852"
  }
}