{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x645a31b3ea5eebaee9802244718189de320f0529ab10a2ee0f6a784d5379d083",
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    "signer": "0x580E4Fca546A25423Ed8677f42d794506710a60b",
    "userId": "562782677"
  }
}