{
  "manageEntity": {
    "action": "Update",
    "entityId": "838833981",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierazuv5oyp3divxzdpclwifsqurf6v5dn3np5zaegwx5scgxy72msqa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1837033952}]}}}",
    "nonce": "0xcb3d3badf357d64891df8fbbec592a68ceaa511e0a6c89a04a44f80b29466deb",
    "signature": "0x3bfc1b75c6ee4296656a67c84fa3e46c9c5d4876889931ff2ed8367257d07f1e5c4129ddd466f26d4a510469e34ef88aed836ce2112b8b5c42b8cbe2456d6fa31b",
    "signer": "0xF266A0128D402f3084C1CbDE99a46172AB58EBe7",
    "userId": "838833981"
  }
}