{
  "manageEntity": {
    "action": "Save",
    "entityId": "1842990572",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9144a783eb9875ddff2ae977b2983a620577c87bc57ec7783325e980c79a190c",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}