{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x68726aa40bcbc50e8f3decd26ee166469492a989b713470d784c16dddb912677",
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    "signer": "0x67bB6F387F0D1D3226E8C821d4e976239bD4C7E5",
    "userId": "305597863"
  }
}