{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1c625cda89faf57eb465a7dbcf09f2597c5c31de3e73f0e678666b818772a0af",
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    "signer": "0x0635b2A4a4cC43C41C76863d69F8c916408F4D2b",
    "userId": "745060719"
  }
}