{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x412802b98936f003f5978766ec7e92034c7168abc1aa1d2900af9b0b9030b619",
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    "signer": "0x365FAD1CA3cF42D9642476189FCB92d609910F2b",
    "userId": "65772740"
  }
}