{
  "manageEntity": {
    "action": "Save",
    "entityId": "364100515",
    "entityType": "Track",
    "nonce": "0xb5e35c33464f03a0033c2fbe58dbc261e944e4d1ca139bedd0721c71525db046",
    "signature": "0x09847d1b55a38087615f3549ef3b82ecd4bd532325a4c48595a98847018825aa5afcc28423167a34f9527c91510043dec35796401feddaf0799948516ee56bd51c",
    "signer": "0xF40fFDde6C2dC1Ce5bE3E0B8ae44c2dC52661221",
    "userId": "524124418"
  }
}