{
  "manageEntity": {
    "action": "Save",
    "entityId": "396556335",
    "entityType": "Track",
    "nonce": "0x9a961f5cd231abfddf896ae722968236e81009cad77b795e6de96d476befca4f",
    "signature": "0xb7a8347b7bee383c8ac3f09185a7e48126e4011fdf31034137b389b6ad34a27c7995facdc3f230e5930fe1abd17e6231457bad06b910677131ec4c1e794a07be1b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}