{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9d3d73c0882409cdeec02f0ca89de0aaa3708ee800882a488164e8d36fdfe808",
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    "signer": "0x796109b0DC0181B0809ce1A81e42f770Dc519016",
    "userId": "96706325"
  }
}