{
  "manageEntity": {
    "action": "Save",
    "entityId": "221403",
    "entityType": "Track",
    "nonce": "0x6ab66e5da8e553a8641f66b4544b7346ed0b8da4b2903cd1b986448145b3a101",
    "signature": "0x89043d3b95b99e64f3170205f2c240ad0052e36ad74d0f4497214b8d7693f6fb567f9389a88f5997a3db20bc50323710c4caf03892ad4c85ca1f08314c7a5ab71c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}