{
  "manageEntity": {
    "action": "Save",
    "entityId": "689047458",
    "entityType": "Track",
    "nonce": "0xc052f951988b792eddce11b777dbaccaa4b44b009f952b3670955cb3c3f96a99",
    "signature": "0xb7497b56b10528131c927e1ce2243bddd6def1fd4f499cfd326762b32ee186ad02bd9b8e78ec2e5b11e381ae70c91e20d470c38525923616496b705eedd3c2c61b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}