{
  "manageEntity": {
    "action": "Save",
    "entityId": "346688586",
    "entityType": "Track",
    "nonce": "0x8c6500e4a5637b1f1e3230d81108540b06c9507842849aa587fceef827287e77",
    "signature": "0x68f6d68b3e80a00d7b3acd92e293080ae57303bb45d6b42d42ceafdf488203ce0f62f1efa165aa4c20a9261c866b29cc8d7c23f58a2f7b8828b7f21ca7e87e791c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}