{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x135be4017c887c67bce9b2924fc06dad1b29eb726c6f992fb80ecc66c3410b7a",
    "signature": "0x89180e0d5e0ecf18a9a2fba333db5d22316a132fad869ac670247bf4176b859931709904207afd7c6a4224cbcaf9f12360f9b42fe43c81b8c3220a460b85393d1c",
    "signer": "0xE5DbE6Dad42e6bdCa67eCD952F5d0a1d69fFCef5",
    "userId": "88788"
  }
}