{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8dde692b84a040b13c68315253d3db58d920d05aa04d80113910ebd66a0807a1",
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    "signer": "0x1cad9Dc848B4917d921Bfd79491256e029A5FeDd",
    "userId": "468495839"
  }
}