{
  "manageEntity": {
    "action": "Save",
    "entityId": "353229050",
    "entityType": "Track",
    "nonce": "0x89bac5097785b1dea45fc64543f2e3f728844120efa1156ee001aa8c88c9ff2c",
    "signature": "0xc843dfad083e0b3ba3d0420a02f3b9648c20ab46197b59ef6e340f73f8227d2404c70b1bf8de67bb87a8fe80e15eaadbe4461047aa1db4f7f05a7d7b7f8cc51a1b",
    "signer": "0xc1C84e5C06F7dc5824672906AC6E51CDfeb90aeA",
    "userId": "447798047"
  }
}