{
  "manageEntity": {
    "action": "Save",
    "entityId": "497807",
    "entityType": "Track",
    "nonce": "0x5395a1c5fe3e4d0a9e9e24568d9b43704dff7501e681761e8a56cfb280b0f90b",
    "signature": "0x977fc4048f89a750bfa782702e440ea2ae721eff62d4cb980bf4011c192e631b5c909fa10054298ac563f0d48e3e516938b500543559f1c4b91a2f95a53832b01c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}