{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x462f38d3a9abb29ab4704387aeea5ac05f85548ab355974118792b37acddf93e",
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    "signer": "0x9d22Bc23fBE98BFfAF5aaEb9ABd40675098B7Ca6",
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}