{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x63cd569c0162d69f037f175bc6268911f4eab60ecb65def6b3793bc56c153818",
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    "signer": "0x51843b81e52AA38ce1739CE5065D090d52d383b8",
    "userId": "817991583"
  }
}