{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x034e146fc857d3722efccb0cee3da6b8ff6a8cfa6dba3b6692ba03e1fc470b83",
    "signature": "0xdf3a5f0602b2ff4817020568e4adcb2bbe35a1889669e1c9fa566e73bc85eaf80565d9a36b3240de9434f3644959a0c43cdcfa512bc31d75ea9177d01df75d731b",
    "signer": "0x53ED6f5d2bc122Bdf52f337889e062520b877104",
    "userId": "159075806"
  }
}