{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x94b1a78fd66a93473f3939a2c74f98c267ca921fca5a7757384727988104f727",
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    "signer": "0xfBfBcf7A6505b548A89EDd67e15c6267Cc972fe1",
    "userId": "703058535"
  }
}