{
  "manageEntity": {
    "action": "Save",
    "entityId": "87904",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7371e6955a91c0b0d8e7d35b510261f249feaadd473e6fb72172348a2cbe1a13",
    "signature": "0xf429b8f6e56ec4631753fd9c7d1429818cd4f4dea512f77a5b0c12b4d63706fa6f1a348b7ff043ee9168cbd46dd57ed0cc2bcb37c76cdbdcade55f8ae30397da1c",
    "signer": "0x1F5b327b06F23985a2eB7AcDEE087c4CE3F79860",
    "userId": "51270411"
  }
}