{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9c6f03bac5b321e5912ec17f26ac1e6d04239f28cdacd6c46bd1f21c9859fe67",
    "signature": "0x6041e2694ce6588ecef21aaef1733221efec7321f5c15b63bb6b0c498d1b4af66f01817b812b4c99eb5f5f082c2255da7310fd77b5459eb268fc462227dc94f71b",
    "signer": "0x372CA9a461c924D58112Ce408A2D849f803cf710",
    "userId": "750264486"
  }
}