{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0c33671c2e35e3ec12094d35d3e0f3ba85eb1d4e8ad66998758d323aed57d854",
    "signature": "0xaadb5b0dd8d8ac4c255498bf54f6f3fd6a2a94f98d093ea00ff1fad0cf25be073e743b83872e3ba6f8b65158783d6b58eb440ceb9b4e60ea511a7748421b453f1b",
    "signer": "0xeF788D96d123BeB9bb95a5928eE279DE14FBdd85",
    "userId": "412929106"
  }
}