{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe6248e1dc2f7b4875e7a3b1e0e4c901ece9abcf0be15722fd68133c66d65286f",
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    "signer": "0x2C90DAAB0E0e848c81D3747e7198D17FC4BCEEB3",
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}