{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x354d2d0bfb52674d6973c3bf929dc7c7338387fdbfeaaaf5259f63bada803a90",
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    "signer": "0x43568f7a8530eF7654eb3fC32B189Aca9ba6dFD8",
    "userId": "42684578"
  }
}