{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9a313aa1f92829353252e0ba6da240ffb2d34375ed60ff8ce344ceaed5fc385e",
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    "signer": "0xEcaFB903ca0Ad57786358d560482a5c5Ec371b56",
    "userId": "106285134"
  }
}