{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4c2a24cd9e4656ae2b43041f51621f0ad41c58070d553a70930235e9a46d53da",
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    "signer": "0x1dEaf6B1d816c1adBBcbdCD2cfaFC05945B9cF48",
    "userId": "524499630"
  }
}