{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x959f78acc4ba42a04b70afd4a87b4146604dd03ef4994f2858601422f47a27ca",
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    "signer": "0x030F578721CEB2d0f9540AA435198EDFF9B77D69",
    "userId": "781474307"
  }
}