{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064239270",
    "entityType": "Track",
    "nonce": "0xd7e46d7405afe42035581e0f37307093f2746242e50adc11b91abd7a2c6daa5b",
    "signature": "0x149125372939c1c146cd56f76d80151399a72e207bf024fc465b8a1b66f32bc543722dfc3c17abe4f8c32c8066f30d9a84480d8b6a94a1d189b09df45ed7d35a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}