{
  "manageEntity": {
    "action": "Save",
    "entityId": "1179787165",
    "entityType": "Track",
    "nonce": "0xd5e95e2970eb3a25918f8133502dd3d9942cd9f45105f74d5965e2b786aa499a",
    "signature": "0xf69b9db57e38ea6339a11e91ca591d203409ecc0c5c0899e70665724c32480ba382ce617b3c0f0641abacb9b84cda1510116546c65eed1291265d8eac30b81051b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}