{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847065541",
    "entityType": "Track",
    "nonce": "0x7ba714d9c6670ff7d5f26eb2f52f984b5039b241368e55d29aac6fd3fe236765",
    "signature": "0xc04a3a7ef77c70be328cad05e89857b6485d284f5ad5a62aa4166d4bd8fcf5bb726bfad1dc8b5fa0a07e2afca0c9d89bc1eb11d5d06e95bbbdc42f6794d5bd861b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}