{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138343366",
    "entityType": "Track",
    "nonce": "0x64e57d10cbc64c2431e305d907800ade450a866e030a3547c41013d8b962cecc",
    "signature": "0xe54b0edf1b17f908c6d003161503603fb228850fd0eca9f0edc963dcf5c7bffc4a4d622dc8631590bf0f0c0797da2ba98eb31209f31a9eaa502f349cc990c0161c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}