{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910659073",
    "entityType": "Track",
    "nonce": "0x2e0810c9855625b4a443ec81ce8dc7c2ff8888fb3e05e3b207d9508c5cc0495b",
    "signature": "0x3a0504b69b05a27658e96d404bdbf4d8adc95ed8d561f9876d8a905734e8736d3406f0ddcc2a64fb02114ac6d12bd1a4560493c3f91b2cbcdbc5f2e94c7ad5d31b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}