{
  "manageEntity": {
    "action": "Save",
    "entityId": "325965104",
    "entityType": "Track",
    "nonce": "0x5590c720f22f90da6ad519615ef9a2ca64aeef971b9bec370bf10df49013c6c6",
    "signature": "0xa96954d256677d4f261f7d3e867c473f6b00517fe21e33fa431e2e3bde099208526064711348aa892aa871c71d23fa2780786d5fb0ed9b1782b1777b85f519131b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}