{
  "manageEntity": {
    "action": "Save",
    "entityId": "1484931249",
    "entityType": "Track",
    "nonce": "1792465150136714809",
    "signature": "0xa8b1e7240dae68493b1a32d448f57d1cd0de7ac195662b2343fbcfe0daf7415b00b854fb4731544410479cd7a9d7e3512326eeebdc17746e66549e5660735d951b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}