{
  "manageEntity": {
    "action": "Save",
    "entityId": "124273",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a5731a698143269dfcc1bab7c0a05213b171f409ea94cba55abd599e42a9f4d",
    "signature": "0xaaa4a0de03233a5286d703250b6eca702ad4c9e7a9fa3305e2e46bf76b588ff175df2cef0e2aecc22362b8e96a0e95a5efea6c5eb066f94d65738f3f59a5bf501c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}