{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xac3336de54e289b2224b034b9c50229641761b0f5487fa906c36b57f780cac8b",
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    "signer": "0xA24e4d4bc903e27F12f8Daa482d123f8f03D956b",
    "userId": "643397556"
  }
}