{
  "manageEntity": {
    "action": "Save",
    "entityId": "1269453276",
    "entityType": "Track",
    "nonce": "0x7be79ba5b42841e2aef292011c1e16440ec9a8664fc01727fabfaff01ed5e430",
    "signature": "0x87986f45620917cabd2b77dd8ba334b262d0cf47c4333bd15ec4a0f3ed9644a07f63aa5681fefe81c0b1e06e213a90c1a27e68ac9da0d78d7a1f993a80fc61541b",
    "signer": "0xD24F8A2501472e4c9FD5dfCCDF80B550912c7FB0",
    "userId": "887242445"
  }
}