{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2e0907f7a68df5a2899155eea10166d4596da78f02b66c84384801c0fa6b184a",
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    "signer": "0xeFA2ddc45870bF116329a9cdF95441d94a34A23D",
    "userId": "135155773"
  }
}