{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5349a294724ae6a4ea8c3f61b87b29c92ba8d956247770ad69d7f885c120fdfe",
    "signature": "0xd034b8d626df416b103cdacc0e1361f4e3502bbf67e348008294a8d27cd68cf273b1a84e17e04990860afc653f7863bb7cbdee6d819409d19ddf433bbb5a3a1a1c",
    "signer": "0xa8e964fBF3855cE16F33d89DE1064EAB16eaB87D",
    "userId": "175460947"
  }
}