{
  "manageEntity": {
    "action": "Save",
    "entityId": "145819328",
    "entityType": "Track",
    "nonce": "0xb561c46989ab71846c9e66b5c1930f1815b68583a59b7a7b5a066709d2ad3ea9",
    "signature": "0xa53cc1ec4b90be0573203bf1334ed7c775237e3b264639a34177a4950a0099a04fd6597c3f4937216de9d2a6f9f9e2a51e8b09f27058638ffe9006795116b22e1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}