{
  "manageEntity": {
    "action": "Save",
    "entityId": "37414",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1501a1f4b74c293863d9e958bf69b9c26d5140f9e7ba613160014720b7cca1ee",
    "signature": "0xcbc92180f714a8e938be33fd60f0a59ecbf78128220c3e5892fdee8b794c06695aa7be623aa3c19a3391a39e8cd8a933ff07c61ce374a59088a5b174f749f9d51b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}