{
  "manageEntity": {
    "action": "Update",
    "entityId": "990308344",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahtbl5tojvvhinlu2bgvfujyoiyilbmif6ktl2rkuibz67zpt73gq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":89444611},{\"type\":\"playlist\",\"playlist_id\":1409111351},{\"type\":\"playlist\",\"playlist_id\":114523},{\"type\":\"playlist\",\"playlist_id\":78544}]}}}",
    "nonce": "0xdfd90a45a2149e91f5beb434a117864b4d63023542e71508454e0f0ef2618a42",
    "signature": "0x4f3eadeb72f33325be474bf7431fb0a6c44d6a5a7d158cfcbc5cc8c10f9cdbed31182b41edf19783271d8d773f0058adaf5af74a058400766d242ad79906c1521b",
    "signer": "0xb23FFd6D016E95A4022Fbe25C4a1179AF8492788",
    "userId": "990308344"
  }
}