{
  "manageEntity": {
    "action": "Save",
    "entityId": "53565",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9224377784abdbb9d41da673ecc12ccd6fe2ba3b5b488b03c2f12ac4a9d60327",
    "signature": "0xfcfab3422cc7eaa0fac170188573c2d72a742af9ce6b55d016384890bdd2c6320344c6f17ea2d2702e3c8fe0014c2b1bdc7cb21839392100b64f7b4ff4d629d41c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}