{
  "manageEntity": {
    "action": "Save",
    "entityId": "1261492335",
    "entityType": "Track",
    "nonce": "0x67d01a4ff188f08611b89d2b439661501c5651956e88072a4c388571be51ab07",
    "signature": "0xc5349df49a4f06ee069eeb2e5291c7d066a11a1f6c670716eae1dfd1b60b831f7e17bfdd65963fff34963b4be89445829864637311627e948d651cdcd153e0be1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}