{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909865538",
    "entityType": "Track",
    "nonce": "0x5feb3b012516dbec8e7f061e418c22f3512edf1681e7d5370a7afbd36b56da3b",
    "signature": "0x4be49588f1968de3641d12607b2de469b0570f2ad9c7d2d805db50e02110716d41aa5e9928f34fc25eba0c136f8d24db4bc430aaa8f4bb3881d894ecb05dc19c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}