{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd85f56581e9958a736fcd72c84d8aa2a37348e71ee48383eaf91bf1c8fd4cc7a",
    "signature": "0xf8c12a7ffa208ba6911774a21314eb07f39b693df98f5f71284a4a22f13a6e137f934706cd4dc966344de4e4c6f5e68efcc5d32cc4314106893dd83545e756181c",
    "signer": "0xAF80af4916ff2256f32dAa1e7658a675776Df546",
    "userId": "968797438"
  }
}