{
  "manageEntity": {
    "action": "Save",
    "entityId": "264936324",
    "entityType": "Track",
    "nonce": "0x75f5ca301dfd8503179156088df22c06898be3c4f12e1d2ae2fd65ded126b73a",
    "signature": "0x7b337b86c00b479decad1b8dd57db12cbc92590ba503cffdc6ad19c4aa12cbe87b596816d3d6d922ac54632e830e5db9e246347d9fa8552d804d0572f9fdf01c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}