{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1aab5774f87b40aa202bc140775e27f6c471418803032dc5a0b31031d8f82163",
    "signature": "0x1c76eecf8d639690b5f4856bc425f4b97b67f3bd8a99e6f795d43e21e31fb9b76ccbd6e50528ebab92c779e87b6572eec643d1730660f8204d75bf032cb3aa631b",
    "signer": "0x52a6783D5814fb237522A58FCa7834aC363703a0",
    "userId": "852331676"
  }
}