{
  "manageEntity": {
    "action": "Save",
    "entityId": "628510230",
    "entityType": "Track",
    "nonce": "0xb4b1e1c2b0c3e021b9b717000dfc544a7229eac2b75a51486364d2361b677765",
    "signature": "0x5443aed424cc18eed46009d3d6d935e749d94b34a8375138b8d130704233e9bf3ec8d389737551e2e3fa676579c42739e58e0f553ea14561049f0badd0c6a4011b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}