{
  "manageEntity": {
    "action": "Update",
    "entityId": "387680407",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x04cc005efe7df8b09fa498aa8bec44c85e5a52433292a6206a6600b6b0d4c323",
    "signature": "0x801e4790ef623247c9c936cef62108592794294a7c6e1ec75170faca9cfbb70d34b8db8a94546b69e09860986bd7e5b06fbfe1dc299974f6c902eddefa9e3af21b",
    "signer": "0xFf41F99020d8F1233aCcCAAba96B21eEb5AadA30",
    "userId": "387680407"
  }
}