{
  "manageEntity": {
    "action": "Save",
    "entityId": "424452556",
    "entityType": "Track",
    "nonce": "1788538955396370663",
    "signature": "0x4bc8912bace8344a57677891a8a000f8ae23919089818e8771b93bc4c627cf216615d752f44568ce0cc0ee9b36ff1c1d9450fe84f5e0e9daf76d2082fd7af9fd1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}