{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x93e61043b82e315bf515981aecb92a011efdb65bc64fb1312e1c6957ee834ff9",
    "signature": "0xac771c1411e48b4bb585157c43ddb35d79a98686ab1321634b91d368c23b149729321d3a26d428793dab9b0ebae39eecc46b74775b6ea4aba62dd210994f5af31b",
    "signer": "0x480308482b6aDaE204F44FFE610e168EDdaC4d45",
    "userId": "861860640"
  }
}