{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3326f5f1e0ba51f63f70d5573b47cb58d76a40977b11592dd4c8fca6c6b71be4",
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    "signer": "0x108D612Ab8b098Fb5c1CCFc861D8531e2abE93Ca",
    "userId": "908696475"
  }
}