{
  "manageEntity": {
    "action": "Update",
    "entityId": "388523895",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera6pumjfu6tonqxu222fuebjnyug25xkh4tdszk5o3dbmiqforuexq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":723058714},{\"type\":\"playlist\",\"playlist_id\":145339573}]}}}",
    "nonce": "0x8849b74ad421e3512e2a9bd98b6aab75d95495402ab6ae22531d3c9d91f5c07f",
    "signature": "0x44862710b14df4189e4ee2f59036e368b8ad42e0ee8d69ba0754778c59a98da208f64f8afc56bc5720196b5e05c078df5ba4e6261dcf873b31e4ba8c1e654fb71b",
    "signer": "0x12Dd122e04eDA14fA483f2F178ea67E04fd312B9",
    "userId": "388523895"
  }
}