{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x09d31e8f1b94be555d29be35c3daa88594b45d27c312bf88cdd0f2d295caea9a",
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    "signer": "0xF6dFAd3798288a676b065b7A8322D2DdF924f286",
    "userId": "84950389"
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}