{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe821ed755740169679b3df323606f463ed58af9194de14dcf00cd71586b87ecc",
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    "signer": "0x194AAE2F31A9C5a610e1Bb19454cCef7729a9C2d",
    "userId": "160547365"
  }
}