{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d30cca2c8808e47812fda9c99cd218f3eab2ba461ff31b95f003917f5b648f4",
    "signature": "0xb8aa470ea30e8ad10cf8c426b2d5909ef63d9dcc72a1ac7403da2abef09c60140043edd2df354d79bf8e7a148ec778780baecf9b90343ad7462242a3eaf0527d1c",
    "signer": "0x4Ff77Da6D5C7286ea15F7F94FdCC04a641dE9a27",
    "userId": "512734349"
  }
}