{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x22195f83275dc22814891b61f477c83f2ad6a80ed57af9545447e76bf2df7fb1",
    "signature": "0x8efb6e5468c88e75c68387e4a21edd14d11760a40acf0ea335343b14e6f6b5d013ad1080220c8b0645b84002aa341441b98fb2278966cdd823946318176308d51b",
    "signer": "0x3AeD7e119d14B0BA01d38E449739bcdc1F60A66D",
    "userId": "36359702"
  }
}