{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb57dccd967b62c90834230d7f269779464a6a39be456fc11b945747383f8e9a1",
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    "signer": "0xab4d5bCD8D724CfBbfE257dE9EB174c2f4673C44",
    "userId": "225853187"
  }
}