{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c379b49bff75e83074f6807fe5427c9436429fed62239153299a0b11c25eae7",
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    "signer": "0x54818C1d1840F835A41084a805899cf92493d969",
    "userId": "701952591"
  }
}