{
  "manageEntity": {
    "action": "Save",
    "entityId": "427431263",
    "entityType": "Track",
    "nonce": "0x6085d948b3b7d3430b48034f1c9b7cd39f66ff30fc8711691217279884ad4d57",
    "signature": "0x893ee89cf5d1ffdeb4f7eae29da654c35940e8b84e8bbc6dc18c56b1dd13f00c194e998494160ff90abbce74565b795cfeb2aeb70f317ecbf2edc7142f16f8a01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}