{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6401cfc73b0cc3f500ec30ce01c68f49bceb8ddeede51706115fb980540d62cb",
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    "signer": "0x54933Ff83b9B63153106F96bd0e9775f32d9dF56",
    "userId": "630676735"
  }
}