{
  "manageEntity": {
    "action": "Update",
    "entityId": "388523895",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraaher33cglvmw7gdwtkadcwf3nmbz4ylzewpfhubp6esl67s3pbjq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":723058714},{\"type\":\"playlist\",\"playlist_id\":145339573},{\"type\":\"playlist\",\"playlist_id\":1779040834}]}}}",
    "nonce": "0x76131221ee4c0b6cba6c010d2a80d7ed0b46407dba43f85695ba5e45b4fd15f9",
    "signature": "0x8815df075f51504dfa8529926d6e2f9157557f7fadec47f391bb36729a7e8e5b2045ceecc8250558aa80548fd19c99261df339523cb1af1342627621942c62d91b",
    "signer": "0x12Dd122e04eDA14fA483f2F178ea67E04fd312B9",
    "userId": "388523895"
  }
}