{
  "manageEntity": {
    "action": "Save",
    "entityId": "97471",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1e98ec33b5cdf5591f3a6220e1294aa8ef3d57e3957525b9521aa39222e8f007",
    "signature": "0xe42b7c7c137f4639f6db37d4b62ca1dc6877a921562c8d79ec943b0343287ab260c3b27f1a31b327a386ba76576bc0e4e95dbe15c53d8ab938402d5ec8397d0f1c",
    "signer": "0x2d4f4b5eB270Ed535B5a91d7A323654D6A1CeA2a",
    "userId": "529386612"
  }
}