{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x291294e97338eca65b6398a6733177e8946e41827115fae980d93324e5a9c055",
    "signature": "0x96212028f91149b0763115f02e191eedc943bd38ab2886a5411774e59c0272786f19250afda1480c3dd99bbed142069c07a77eeeda62325dadeb9530de2836f11c",
    "signer": "0x88DE6E278423E69808AB03c717d8847C333CD1B6",
    "userId": "959617631"
  }
}