{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x52692b813803d7fc0b2ae06fe1aae04cf73ad60d021c564e0a8a22efa94cfbfa",
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    "signer": "0x9a7C79A8F5E088eF6f036a0c25618325AD8bC26a",
    "userId": "238327041"
  }
}