{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdc41cf354d85d3c28375ca5e3e42db793a907d765fe26a27ca7667a25a8d8f70",
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    "signer": "0x0aCBe776F193025439CaAAf7e3f4f7D77a63463A",
    "userId": "473952438"
  }
}