{
  "manageEntity": {
    "action": "Save",
    "entityId": "352710047",
    "entityType": "Track",
    "nonce": "0x5daaea84000501d5641edf99c4239f79d48b3017e6f676e2c2bfec1b6072c576",
    "signature": "0x6aeeaf4d84be7f463d0b7dec30f660b08991bb6e598adf29e276caf251f59ab63b880a6aa6223766cf4ed966a2c57ed156fd5aa58bcb8279ca27c9867e1562e31b",
    "signer": "0xB1F7c19dc841aeAe6fbb5808f71BdE7094ce627E",
    "userId": "461761656"
  }
}