{
  "manageEntity": {
    "action": "Save",
    "entityId": "760459596",
    "entityType": "Track",
    "nonce": "0x3cbe15052859aa07a66729d7b3675263191d326e24f7fd25010576c256043cf9",
    "signature": "0x4a2dab1561d73b8d3fbf3df56a09cadbc4fb97e48e1a5dd6c972f1b0d42e211a537e409b6b33bb3e9b9a9bfa103bf2dcb8de7b9cc1d2a82bc2e6be673c11c5361b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}