{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7139675ccf5843c0609ec5ce12113cd64069c4682b5ddcf7e819ccf235f158d9",
    "signature": "0xb44eedb32d6a6ff6c4f325b7c887695c312f3f8f4c21ed5b0d9fdde8584d9c0e48c18b07dcd07b1eea032b478a4fe7861a6b6dc1087ba1b0ac26266fd600bff21b",
    "signer": "0x72C4DDfD203AdC8e1B63eC8DB4D3b9Bd81b1Bd32",
    "userId": "126410092"
  }
}