{
  "manageEntity": {
    "action": "Save",
    "entityId": "326802186",
    "entityType": "Track",
    "nonce": "0x18622678591d0915c55a543e98637dc9934df81b0741a8a7c4a57ca5eafbaf02",
    "signature": "0xdd1d49dd43001b65b948d74ce74366686f7b7b103c185926445262fff8a9a8222d3c3dbfdb12c3644c381f9d04da9cd74a814bc5b3bdf07f582399b43a09e9b71b",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}