{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdd45e877f060838896d18dc20cd34497b48a3d5f62491e6b9e0051c85bedab5c",
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    "signer": "0xb05ac4096e109913e44Cb0b42aFB2b624f69b505",
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}