{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x43e4cb789527786c03ff02bfcb2f636dca45639cb77543247301dea07d8f354f",
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    "signer": "0xb9B88a80F1742b27AEAff7D480b7adeE3bdE5431",
    "userId": "650953402"
  }
}