{
  "manageEntity": {
    "action": "Save",
    "entityId": "815701929",
    "entityType": "Track",
    "nonce": "1791121934223700488",
    "signature": "0x2476efdc7b23e1feb77f761ef281a5fc4ede8d003218e6d32b7aadd39bbe858d157e44eb00604f1cccce93000532ee3f253e2757ca1d4730315f59a6dddfce591c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}