{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8517537d353a13d384bd52e5dcbba02e93ea9be66d233fc0210987d5ec36f04e",
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    "signer": "0xE71ee388fAb83cdc5deF0ad1211584367a3DC0f9",
    "userId": "264798556"
  }
}