{
  "manageEntity": {
    "action": "Save",
    "entityId": "256713827",
    "entityType": "Track",
    "nonce": "0xc316b4f49a956f6d8c6fac27dda5fdb42f8c71097b7afacbe5748d35d091e0e4",
    "signature": "0x591551c4d8be0d6fc4bc90b564ac905200df857a1603c2802691b956eea674ff6bda3f519232ee9250b16570a1471f85e0398e53014b1dc68792f92e262fdea01c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}