{
  "manageEntity": {
    "action": "Update",
    "entityId": "748892693",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0bc812030d67f57216bf42034c290232bcaed379fe72250643a90aade349999d",
    "signature": "0x875f63228fb0ffbd0f0ce4f5ce86daa341415c2e6469215da0e440a002048e6522f8abbaf97bcbb11d83014c0bebc65dc6667f5d0749f41093de71cb2d6f32541b",
    "signer": "0x20Fe395061E06851Ee416aEB147c690057F23af4",
    "userId": "748892693"
  }
}