{
  "manageEntity": {
    "action": "Update",
    "entityId": "390610011",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x840665af1ffdfbfd52843f34c2f70ef54df9563cf4095da905b67dc1c143f6d4",
    "signature": "0xfbb29abf6fbc4b58a611f30607abd48656bcb6b62b89df3a4385d0273eec0f6a4816d079e52e27a8bf7307d1b442aa73bb580c3943774f161ec226571e4282c21c",
    "signer": "0xBCF487B3BEFc33ddF0BFA2DEfB12a3833d17870D",
    "userId": "390610011"
  }
}