{
  "manageEntity": {
    "action": "Save",
    "entityId": "436957",
    "entityType": "Track",
    "nonce": "0x1e3b39cfcf10107df6eaafc3ea0a9607eebe7a8504aad9acd03dd6e98c41d654",
    "signature": "0x9fcc7c484f4dbaf08b05200dc24a488f5e2b3ae883994aa9bc96d49c53d93b8f73fd1e592d7bff9bd5337fe4c6fc2d577d3dab6517db9b2eaf7e4cf39e3fb1bd1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}