{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7a9b5756589acc18b533f4e9dd4e227afb6db1c1499561bc7bd73784c728276",
    "signature": "0xa226001770e312b84e2ab6b83844ef151dc3a892f652d586a9ba4c75cdb9ebbb64e006cd53dc0af4c82a99c2b7353b68e5b8f0b23daf811321eae87061f78e271b",
    "signer": "0x014bAc1d10CB1E2654FEec2313cB76aDFe41f1Ad",
    "userId": "551705448"
  }
}