{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0fc9663ff96c586cdc485551ffbbf455a72ffc9ab6fe21a1a0ce42de705fde4c",
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    "signer": "0x32434E0b41660Db9fA4e47F6077466388a46920f",
    "userId": "12199196"
  }
}