{
  "manageEntity": {
    "action": "Save",
    "entityId": "77504955",
    "entityType": "Track",
    "nonce": "0xfa1bd7580b06f11ff1321add957c93dc5fb2f5a208f140ff48af4036cc52accf",
    "signature": "0x0bec365037b3a287cb72273a298b75c80ed3950257ed8c87b7db1a6e6dfad36c41dc6299d23de635b3805bb4a3228234537ef1b2ed43d4ab23c8caf68baab6a21b",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}