{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1895a504d640e9e42f8a2f5760fa0ea53ba068edfd390abe1527f248e2758df1",
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    "signer": "0x3Cf3C89FE8F0fa5C671377B145Cd7d5e83fa0257",
    "userId": "159488853"
  }
}