{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2fa13ef6eaaf68c3e35ab9b111524d399efc5373750d7e1ac35aa33d294f291",
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    "signer": "0x09359D349a3BF3C23fB98bF8cb96feb3D6cde136",
    "userId": "145058202"
  }
}