{
  "manageEntity": {
    "action": "Update",
    "entityId": "753535412",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd4fa9dbe029ff321373dbca148c7d091b2dd883386b815a2640af6d261d36410",
    "signature": "0x6cdfab094240e442723d6d41da0e2aeef9c83400099de89a9139098ce8a817942d7d3e145d2061f67b105a3a385ecd0236f8a4fd13bb26e7bcf056ceee3191331c",
    "signer": "0xB1bdf4a1F5A8736A37D699426bA7dDe0aCDcdB58",
    "userId": "753535412"
  }
}