{
  "manageEntity": {
    "action": "Update",
    "entityId": "891356089",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xec384e381ec128adf8851646b1a6faf73a682c0e4a0c771d5728f00399878023",
    "signature": "0x02fb5f12cd741db6d6df4cc218b26fa67dc01f1fba1160dc22871a997bdbebac002acc82353e95fe78338bb0010b7f665a244e3cf33c57bc92658aea865812c51c",
    "signer": "0x4dC20D77e505d1657d39Cf0544bB81A6B4790185",
    "userId": "891356089"
  }
}