{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x011be61934205dc016c98cbea82f56479a36acbbba0cba6c912336ad3ac5ad7c",
    "signature": "0x30605416c4a3ed322594697dbf1a65a143e1eb380c73cb5b46a5eb4bf6e4cf7f68c0cb32ef779759aa89e58fda9931877961a1fd501b4edc155860b4255fdd511b",
    "signer": "0xff71094FEa68Fe1bF25b9eA977054ec6433EECD3",
    "userId": "419309611"
  }
}