{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755149352",
    "entityType": "Track",
    "nonce": "0xdb75d18b9ece68e1e1b6ffe0fa78cb5fc9f06c1fc13a2a045ee2f8218d63ad0e",
    "signature": "0xa5a123063f5641d4bf42d29d558cd54cc093468a68151cd67645bf8ba41bb9cd37cd18abcaa59365052c18d35d4c82ac274ccc41719a0cadb4ba6d84309696ed1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}