{
  "manageEntity": {
    "action": "Save",
    "entityId": "1552689876",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xef98dbc7008ad67d400e03d7a34a854c2ea6b9ff7aa4deb172b1e9ffdb1604b6",
    "signature": "0x6c0c415ab697e58ac1cd005798205e7ebe48a1847094207caaffeae1a6748ebf7407cae7790ccf8fd35d2e6e95f72b7884d3a1a56ac1ad460e475137a7876f561b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}