{
  "manageEntity": {
    "action": "Save",
    "entityId": "1220202084",
    "entityType": "Track",
    "nonce": "0xacc066c0fb0b785a68788e34734fdce29cc605b583628a0c541d7e04e76ac4fb",
    "signature": "0xc85d46a7fb6b5d3fcbb3030deb1c94b60d6474f69c4e9c4a39cbf30688083c862ccd93b04bb7e11519102b4e8b884d11f6d0c07e3e9787392080f97b0c4dfbc71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}