{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x506f857963ae5f22c527e935bfc8c4f1c1cd28e42eac8f69fe697cfe9b7cd5bb",
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    "signer": "0xADC36125DA619c071b99a5906FE34DB5e2998004",
    "userId": "910119677"
  }
}