{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd55dfd379187ce77fd4fc20184f15bdff0cfc750b878dcd81b0fca19184169c9",
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    "signer": "0x2F50f86Be5E8E960a8A80aff85106ed93A2c681B",
    "userId": "778093041"
  }
}