{
  "manageEntity": {
    "action": "Save",
    "entityId": "528707381",
    "entityType": "Track",
    "nonce": "0xc65b370e181dfd893cc7a6a6b3a3ad5acb0ee154309e8dfae68ae727dbbdc5c3",
    "signature": "0xaaa3d1ed43745b2bb5f08374d2898b89691e358c3fa8553ff2a294a4ad6969bf2d11ce5812bd6e1476aab096fa64a101ffa0b790725a27e75dcb96916532df6d1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}