{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343891306",
    "entityType": "Track",
    "nonce": "0x17df76a26101d76831131709a04320e7c27e53fc4628021c5b23659b98aa8cff",
    "signature": "0x795a7255de48babaf9e68879c29b36f9ddcc6bb96fca3c8d17ffd72400e6a1b26dc7714193b9a3aac80b740767a6d4bd1f3d70105a1d5e04a20edff6117ebde11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}