{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7c39ef5c6e41dd9450f00528a1dff231b43fa2d1e2b8beaf3df270edffee5590",
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    "signer": "0x6aFe17E535b2A6d929108f7F963F9a119F573Bc1",
    "userId": "300002611"
  }
}