{
  "manageEntity": {
    "action": "Save",
    "entityId": "1475239071",
    "entityType": "Track",
    "nonce": "0x812ae09860ea48cec869f57687d500890bdd30f6d991e6f93a2734116113f3d4",
    "signature": "0x0a017922f8b6c96a8c6d172eb8b0f7f72746997cfeda488253c64cd9bd61d2a76674445602fa66353241a77051eb09b0a8bb6901c4873536f9035f97e635d4b01b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}