{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3e6ddaa4143c6710bd9610004f843dbcb30d5eb9d942d6e119462a757beff754",
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    "signer": "0x5Df3A2E4B34Fe42345365C26177e792DE82F2e7f",
    "userId": "377614620"
  }
}