{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848435441",
    "entityType": "Track",
    "nonce": "0xc9f1764f94f03aec186b89b2e51dbfb3e5a2f5ddf1c446bb4b465abec14cb156",
    "signature": "0x2e5165ad24fc8da30aac521815920edda7cfa81b2d437061ba204b6161a5b1800a3c4a131686242cd917edcea3bd5656f14d3e135dd0321443d9362b33a84f2f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}