{
  "manageEntity": {
    "action": "Save",
    "entityId": "580550791",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x310d5c5c98fdc94d6ea2115d22fb990f5ef5ed83055975bd45725f353da20fb5",
    "signature": "0x37151d17222aa07d5dac3e989d80bc1ac6da1c66a72c704e14a3751188c1d61f443d0e442d548124d009ec40d821bb51a6c5b8b6176ba7d09974b213c670c4e31b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}