{
  "manageEntity": {
    "action": "Save",
    "entityId": "586465046",
    "entityType": "Track",
    "nonce": "0x4c3cb70b1d3adfcc468c021585b168d17475dec961ebd5a0c3a62e1552140cef",
    "signature": "0xc71d3c7caba03d2f2a57ef525661cda244100e0ffadc2fee3367e3b16dec18e378734be54a5ff5f8a456731859d5404cf658af20e5224f04f27ffc7eb10d5e271c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}