{
  "manageEntity": {
    "action": "Save",
    "entityId": "1319395979",
    "entityType": "Track",
    "nonce": "0x7a06194e440a7c40ca3e1b0d10676a84aa3a5f26d21033f1676ea27f8bef36cb",
    "signature": "0xbe107c10d950a8f4ef18f79a5274d208a10e6a20b7cb1c0738580a8ad1386de759b8ceb5c7acd6d8d7365766ff81635cecec2eb740545a30107682c74203c0721c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}