{
  "manageEntity": {
    "action": "Update",
    "entityId": "576874887",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraqyhccufqj3g2adqzizcu3qw7wixfe7yvzm3tbm2kec3ubcg4fqiq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1029682136},{\"type\":\"playlist\",\"playlist_id\":875740074}]}}}",
    "nonce": "0x2363e601ec76f244829348647a8ee63436c0d4668113f098722ede6f6347915d",
    "signature": "0x339b302d29f2dc6339d9c4ce559161af09dd2f414f1a878d1f2d99e4414a35177a70a61bbe689eeef48f5ba5fe0c6809311bbd918dd1c3381b1f21aef70a21911b",
    "signer": "0x74Cfba397474D1C8E5568957E9684113ad5A2Bd8",
    "userId": "576874887"
  }
}