{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016931242",
    "entityType": "Track",
    "nonce": "0xd0827a5aa6934063ab155fdeeec191b2ab3de351a33bb27af78e832ef65644eb",
    "signature": "0x385fc45053dab7de014ec28f6c91c05e481e311f56fd7cabba600a1bd7aec4095f91004990784e13607e5a635a4017b36571c72907b2987daaaff0e30c16fb851b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}