{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917571089",
    "entityType": "Track",
    "nonce": "0x1907f22189e1d7b177c379b35999d48c03801aac3fa2c424f868fa28d7fd61dd",
    "signature": "0xf8c52380bb3c6bbfc5249913561fc67333c547a8e7828627795bdce73b54642a3e713b2edc1a71615f11a930a970cae8c19169919e605e10d89d0f75b0e5f53c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}