{
  "manageEntity": {
    "action": "Save",
    "entityId": "345616833",
    "entityType": "Track",
    "nonce": "0xd716efa2718c3c78211021fe6de4f1f071b5973ad44f62a2ebe97e9429488afe",
    "signature": "0x046de522131a9389fc0c271b19a54dad0473e783b9ed8b6ea71926613708d86a4a1551317b55b24c77135d6c31bec5c44f04d24e573bad12563c70291b26a7d81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}