{
  "manageEntity": {
    "action": "Update",
    "entityId": "519609502",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1fbd2f7dec28e95511ea33860ca867ce192a8a575690076c88b59cc6365e1a25",
    "signature": "0x1f32eb4eee26694ec5c1d2ece7332a495711899e0caf54be5e423d585a93cda43bca6a0db952b6bd2387b17aaba4fdfb3e5d02e3d0cc5f346327e3274ce00f8d1b",
    "signer": "0x05255749FaFceDA44388E2AB9F40Add18F7e0603",
    "userId": "519609502"
  }
}