{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8ae9fb9318d99163206428817e30b55eaf20caa9de96a0a315ab87309335b99d",
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    "signer": "0xdca010dBdF68c902FA6645F901F92eeA1017981f",
    "userId": "821058285"
  }
}