{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969764030",
    "entityType": "Track",
    "nonce": "0x7c3724a8ac6ffa7cdcdadedc80a95040743c5d1bcd54d543daa23f1b6d71b367",
    "signature": "0x0a14ea43f24a1b2ee27892b0284b8a0ed97561ee5db771ae627339c762fac8cd69694305f5f22da57609e27fd7b3600667c0c8b5a16e24e2e54da61b085591961b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}