{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd5d6137b8392c3b606c6da3e88697e63653f4ae42a63890ce8a636bd32cf3990",
    "signature": "0x529acc9ba3ef3b30d20e9909cdcb4ec508f7bb6b32c421930115e700945bdac75cf56f440a9cbeb0b74a75c9a6e22265aecebe7cdf942ba623adef4127f51f4c1b",
    "signer": "0xdb8Ba48593cf256AFd06488c745bFC1952D0cD26",
    "userId": "223978438"
  }
}