{
  "manageEntity": {
    "action": "Update",
    "entityId": "208431511",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierauszf6l6dgf6j43m4bh6wgfw42obrevaqy52ieedndqu3iyk3z7ea\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":37967}]}}}",
    "nonce": "0x58c7f374d8ec25af20f9f9888daea84c138f74c641f907b5fbb1f2e979ff9c84",
    "signature": "0x5cddc16481255ebd4fda841c2e72b4c7e85030553d157965ab8536e0eef8245a0155b5d7756b125980e99f54623ff62a34009c3c5b752a1602979c279ffce0571b",
    "signer": "0xdf555AE1cDda83689Ca8307CbD9048AF27b89b69",
    "userId": "208431511"
  }
}