{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa8fd540ba9afa5a8d06831f0fc157b23ab6b4cd3ba4e0ee47f2999dff459f02d",
    "signature": "0x53002dbc54bff0c93f080e92bc599c1656aacef7cf0e328c738127f8aa4cbaee23fd214a6b2180fc359580772a0ea9da2b9f3f953c98ffac714f71039073543e1b",
    "signer": "0x907aC62756E029bf9e827f2fe5B765617aA619fB",
    "userId": "189047632"
  }
}