{
  "manageEntity": {
    "action": "Save",
    "entityId": "328268690",
    "entityType": "Track",
    "nonce": "0xf00dec9d2b90c9e915989c3541c6bb21b7529f2ae3b71301273b98247d7adfdb",
    "signature": "0x291a94a8131ad12ceff30ba0e837e060c471dd6c689b1264f2b0d0ca791855186f3b92004dedc9295c42cae9832893b3d179238b860d57cfead637c9364c16641c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}