{
  "manageEntity": {
    "action": "Save",
    "entityId": "934321734",
    "entityType": "Track",
    "nonce": "0x0640d9688e03204ed2bb37e968beffb04cd50a731bf72cc233cb04ea4216df92",
    "signature": "0x815a9fe0a66f8b73e4d714069cbc60cc7984ae5325e734586617d346d334affd7af42b609a6aa769e664f1b985000c2e6a46814fc06bd9f506a3d3c5d285c45f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}