{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5319872dd0f9650c02687beefd55f3dcdd98b1707dcd8314816eb12ac8e3fa2c",
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    "signer": "0x00b79791F10Dc166B936fa25519bBBB51EA93551",
    "userId": "570505045"
  }
}