{
  "manageEntity": {
    "action": "Save",
    "entityId": "266693",
    "entityType": "Track",
    "nonce": "0x16be7b2958070b5b1aea3002a069bbd085c46f15b9972264a6e867c397dce0e3",
    "signature": "0x5bbf331cf71d608e158a0a8487483fcbb352aca7dc94703ba5a736efdb08f1a27fcecddde6f9e31fe038cb04dc9bea05b82173e16d6d694583ffd3040cf817a81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}