{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118703342",
    "entityType": "Track",
    "nonce": "0xca817deea3b2ab2034a771b1f15bc5b6a7e4c79352ff0a79a6167f16bab14b4e",
    "signature": "0xb6d79acf622c557415c220838d7e4b97b89495e6e566ae01f52ba29bce4cc5bb12bd5052c93da1ca0389424ade8179355f05c84ad9dce11579c684f7753111961c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}