{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099125430",
    "entityType": "Track",
    "nonce": "0x600f6ce68a4cd57cdf01ba443cfce91da15e7f4441929aaab0161bdb14831028",
    "signature": "0x8980ac841a79a4df861e8583252519b96137263e938b1a80358c2b27e6ba250d686b001a796a6a4c331b1e45291ae39998f9bebef3987a6ced40a9ae1932fc061c",
    "signer": "0xb0bc7585AC84F169814851A3C22d8d92D133337F",
    "userId": "267657235"
  }
}