{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe045179d452c977f65f8ebcd922906fadd2e1bfd9b13e6fe6f5ee8150b7d95aa",
    "signature": "0x2f1186056587af847d642ea38c483292db372dae7317772eae9713a826573a1c22a73565fc81502e095b759f20bbd621526ce88075f13532f159368304ca6b481b",
    "signer": "0xd8466eFB87ad3a4a2b6Fc8A600457F3c6e608a2F",
    "userId": "532293694"
  }
}