{
  "manageEntity": {
    "action": "Update",
    "entityId": "301719964",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8ba4572dabed403de15ebc76de4d208782ef080b28c42ca3afc5d778a2039dd1",
    "signature": "0x1a5dec589fa224cdd47ac0a68029de2320ad978dca2b083a42751c6697319f5e3781d2fdd46e88b2114e2ee0fc8049a902e137503c30c6425c1887204fa892fc1b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}