{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2d2c89c0ba38abd09ff7f69e8ea125fa38111445025e57d894e9a597b226fec7",
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    "signer": "0x19C8492E30452A1491Ed1D1bC2EF39d470A34C55",
    "userId": "289578894"
  }
}