{
  "manageEntity": {
    "action": "Save",
    "entityId": "1934906715",
    "entityType": "Track",
    "nonce": "0xd1253505c42c7bbd805cca0735160ea996b2c103621466c1af7585096758d0b4",
    "signature": "0xc5a5116a0125a4b7c26b7dd9ab6ac46855c05392d5ec11107f1763a88d885a8c2255a38899c8a77e404fbce3c793d2b1d59ce9d26e94f7328370ae99ab1913961b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}