{
  "manageEntity": {
    "action": "Update",
    "entityId": "300460029",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbc9d5f81af34ccf716ba3173f1e3be1926933390a11260a835ea0143308c3b39",
    "signature": "0xfbc34e0b4200f0791e974b6596ce799c5563acf07a627f89a3956dc9461703433f8fdbee7409b1db8f982e3d5792a73c592933fc39b11ffe4acc860b34baa5321b",
    "signer": "0xE48F4BDA8DBDE8b4300791d6D868309031E73DE2",
    "userId": "300460029"
  }
}