{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0907fd97c085397cee59bac837b6d87a26a8129c38f73ba074f91896f34ef95e",
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    "signer": "0xa741B0106346033C4A499068360937e06ee35E62",
    "userId": "780083254"
  }
}