{
  "manageEntity": {
    "action": "Update",
    "entityId": "753441541",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x66c685f9652f0ee81a0e9c538e86215a548ba912381974b48a4bddcfbba3531c",
    "signature": "0x8da00ca93ebb175b61ff459965c1b51896c64caed875a1e1e41eabe78efb82850e46e060d68049c2992b8fd9508b5fc3480ab860d7e1697e083ad132b8b59b2f1c",
    "signer": "0xcd6e4F197353125a5AbA80145Edf0eaB92cccEB1",
    "userId": "753441541"
  }
}