{
  "manageEntity": {
    "action": "Save",
    "entityId": "1440895079",
    "entityType": "Track",
    "nonce": "0x8af3093487259b33d2aaed9952b4dc7dac570e006dfb3c088fcc1b25c412ad6e",
    "signature": "0x57d5e042e4c3bc4100c105002dd58ca6c0681b49d8e0a73125c63e705ebe4b9d4f091e67de7de8a3fff0a113fd59b14a5525600945dd03440af52082388df3041c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}