{
  "manageEntity": {
    "action": "Save",
    "entityId": "2101654740",
    "entityType": "Track",
    "nonce": "0x223d742b1ce058f77e7f7c6da94cec6ba342a17eea558a80fd20fa0dc5386f38",
    "signature": "0x4856f104e66fdf54f0738cd7b2a252ab4e23ae75fd968b59fa351addedc46ef34187048a873fb2cea9ede110f4cfe24a8fbea1d42b62c19ef5a46f7c426d37071b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}