{
  "manageEntity": {
    "action": "Save",
    "entityId": "1583516497",
    "entityType": "Track",
    "nonce": "0x32b6e283507e7985129c91ce8f202eb64ce70f50bcbf2d0b990f78ecaee0085f",
    "signature": "0xe9812d2aeff9331336e66e5b613e6950c32e4e1efd2bd2ecfac719f37d36181b2e526639b775b95a5cb19756e72f022b46f07ad51e845322594469ad3f91b35f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}