{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfffcbd593c890f19fc00e612b2a83a9c40abc668c9bda349f609f1686cf2be4a",
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    "signer": "0x67462e82673772e8CA9F82dDFb0019F5b07866f1",
    "userId": "671407449"
  }
}