{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4b4f8b4808f4e58dc00430481c8121af116ef1334cda6ce494237d38d6b12218",
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    "signer": "0x38CD387a8CF15E363398728E6749A2259D566866",
    "userId": "923056529"
  }
}