{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5667df0b464f66f7c3f634a6195a82b6ea97bcd3e68f08f186d4fadfdbe487d0",
    "signature": "0xbf8935813aa07a179fe2567628067a818ce5621b0a76e440bccbc759fd5ffe573e756a361429e043900803c8685280bece4e1482b3a22107f4dcc03385041a011c",
    "signer": "0xac9398fE3324BB093c993C791Db4a36624f5a248",
    "userId": "223946715"
  }
}