{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f59cb394a14a81a2d798b7d1a99249ea8b555ea3260abfdc3ee86be0739958a",
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    "signer": "0x90A203647e830a6BCa374f0203a7d7edf8227684",
    "userId": "750901803"
  }
}