{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973982105",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf0f885a89a73036a38ab804f53cdd808b22295de1281d11a220b74064507d8de",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}