{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7454ebf3bdf8afbf1f6769cc3cb9ddf285e5e613e59c45759d8d0edb4ff13404",
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    "signer": "0x973D027d08467999f96f13DE0654099070B83a03",
    "userId": "732183916"
  }
}