{
  "manageEntity": {
    "action": "Update",
    "entityId": "299339626",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierambe5givhbvxffz2sra52cfejtv6lq2tgglxomly3va5gllgad5qq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":300787445},{\"type\":\"playlist\",\"playlist_id\":29410742}]}}}",
    "nonce": "0xa8c187da8386e84cf0d276283d28bb2e1dc410363abe37863fc4b52c389ce82c",
    "signature": "0x10db752f66cb288bb100d74c93650b5b0faf7a55bb8ff2ce95a0c08f840bfd16426b5fe8e5d4c85735902335901879593b91cc59f5f488746b2539f5a1431a3a1c",
    "signer": "0x8B88e5d2b2c544e566c23f8447d80C8AAdb156eb",
    "userId": "299339626"
  }
}