{
  "manageEntity": {
    "action": "Update",
    "entityId": "645731655",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1fc7366d4a3a8b8f6ee220ab74af001e175247e9ade298322a8eeab7aa148a9f",
    "signature": "0xcdaa8cdec6eeecd725bac1c364672ce94789d617e859e17ce509b1302b15daa720bf9decfed7d61051f6a61d9517a4a10c307bae040657cd9e03bce3a0922f4e1b",
    "signer": "0x18106D70588e25d7Fbb05b7f449629f6fDEbC7F4",
    "userId": "645731655"
  }
}