{
  "manageEntity": {
    "action": "Update",
    "entityId": "400101313",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x742708db8bf32bf1ff12423690ff0f8b20cf63f55eb185fb5fe82eb2a80babb8",
    "signature": "0x7a4350050a4631c12db8d3433a63765b60b436523e92208fafe29d9bc1f9f9b959a21c655edccafafd2d818d3699d018cd09d0395fbdddef49ba9005707950581b",
    "signer": "0x45E821Cffe44AC8A2Ba48dccbE6E3054922188d1",
    "userId": "400101313"
  }
}