{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa0fdfa13498a614166c991036719a58bfe18d97a39a8633cb482d78e840cf81a",
    "signature": "0x5a3b49969380e9234caab16f093b8e63e42e71a35cf2571111deb863208dd087583b81c6e8804036f4377c88891674413f7ef143e96bbefdac963f3c2ebc0d2f1b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}