{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x98f73fffb375c48be5502540652ff4f060128bd1bc622b95bf438214d59533a1",
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    "signer": "0xC22F133187823f83f32A7ECd149574160C9619C6",
    "userId": "251000392"
  }
}