{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f498bb7dedcbdd446c8e1411980c8f8584969381582d1fd54df99763ccf7e62",
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    "signer": "0x0F2FFdA72e91b0F099a154B2451beaCa6E6230d4",
    "userId": "745070052"
  }
}