{
  "manageEntity": {
    "action": "Save",
    "entityId": "1276634771",
    "entityType": "Track",
    "nonce": "0x29afdf4617e660fe894aca418eb43781da51ece8a341cbd545f28c02cb649576",
    "signature": "0xbd8e37690a99e7a80e255b69721b03d20a2add3f39c0b8d9b993dd981553358d2a960a6105a91268c377d36333433b3bbf345538cc1f5527c8fa9ac568f160121c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}