{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ce7e14351139d1b9c2e27d3cd9d19d1fb2cbbde9aa9cb4b2bad9eb8c4015bc3",
    "signature": "0x4fd2287385e3938d58f33428f946c5471d6755954236064d1c60f24170630c8a54518042a5cf301404aca39e8bd0196a0dd7bf4d390ffc53c90b673285030f4e1c",
    "signer": "0xE791486608dfdA6c7b64bFc4Fa2325d573B7F51b",
    "userId": "691618247"
  }
}