{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x392ddeea8d54cf119bd2e16479c1f6a1ce872d070c2d4415bac47464ea3c5b3f",
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    "signer": "0x7880e26a355bef454b3558ACb8f68563AB519B8e",
    "userId": "282839670"
  }
}