{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x756c95b78086b0145948483809070fe7db12d2798dedf65f93a599d7c0fa1db5",
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    "signer": "0x356Ce5FbC134DfCC22701a177221069dB72F8adA",
    "userId": "326723341"
  }
}