{
  "manageEntity": {
    "action": "Save",
    "entityId": "353874440",
    "entityType": "Track",
    "nonce": "1794073056788655747",
    "signature": "0x1a0d4d9f4b6dc096c8773c1e166e16ec7cbbc4083297aaddcc04ef32578af25a7ffc40805bec6e04341372e5bd0c75bb9193ff406384c941abaf99c75fcff9b81c",
    "signer": "0x96bC9fE5e656c8996dfb391Dd2FFD06C6F34e475",
    "userId": "631594746"
  }
}