{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x463db8dccbee889129f31fcef2fb31237e2bfc18629408c123a7304c9039e4aa",
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    "signer": "0xE3302ea03434dA998C2fcf0647E2Ad4c5a29e4f1",
    "userId": "621042450"
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}