{
  "manageEntity": {
    "action": "Save",
    "entityId": "189352310",
    "entityType": "Track",
    "nonce": "0x8e6eddf32263f5d39e4f324f954eae845d3dff163acda48ff602c907451145fe",
    "signature": "0xae391ae16db0d2c9a35f97aa6fa8243b5fc8a6fefd74609642487ea7049d91b417be790bd0e87a5fdecd310c5294d9b596ece31070598cdc965d41fcb60438511b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}