{
  "manageEntity": {
    "action": "Save",
    "entityId": "373705900",
    "entityType": "Track",
    "nonce": "0xb6e47ffd515d055f1530cefb1d95ce5678f4dcecfd4150fff8eee6cfb70ac21e",
    "signature": "0x15fc202c1c8c120fce3bad69af97a4eabb583251b6b163971878a3e62f256ef644eb775e07c08d23ecdd889afba02982b99d8abbb1836ffa16c04392ddae2ddb1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}