{
  "manageEntity": {
    "action": "Save",
    "entityId": "1786137479",
    "entityType": "Track",
    "nonce": "0x0c7048c12d8f3d685d00515eda42cb2d92c5dd22d20a76da051b897a7a0fc9b6",
    "signature": "0x54b5bf0b156c008cd11932400d1378c20ce791d191049231fdb66885be13681e292a7f9ecfdab8ed89f072c96663cd286c62f2faf597ca07083f75f980bec35a1b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}