{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ca99a4b0fd7e9c5c5735029f7485ca1f490a3a19d69568d5f9e0c0bae4055fe",
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    "signer": "0x4142F178fc27c3DC53f1012e505fBB8Af788a26d",
    "userId": "802455146"
  }
}