{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe64c6f14ee553754b162279efbaead762c46f76c22c997e28394fbf3fce4c537",
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    "signer": "0x799Fa81223D300f82003F7f458aBE23eb493474e",
    "userId": "455410181"
  }
}