{
  "manageEntity": {
    "action": "Update",
    "entityId": "539898390",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x93052a76d7a8000d715b311a1c3338bfb3ae3e3506458de3a5e6313475a18f57",
    "signature": "0x211eef58c4b79f4b21b64fdb817e6758fc18907f54b06a90876cd6fd01d72d9620deafe6bf2fa584bedb6bb8d14f3b70bef5db4e4bc1bf509cd813d3e89369f21b",
    "signer": "0x4b6B842af75cfAF1fb1Bd7B073C47b1001242a5C",
    "userId": "539898390"
  }
}