{
  "manageEntity": {
    "action": "Save",
    "entityId": "605272982",
    "entityType": "Track",
    "nonce": "0xdc9d07f789bcde27f9213fb6c16716dedd370e8cf641fbf1b56234802682d277",
    "signature": "0xb04fe05cba890c3c715fa4ba7b069f195f0e569748b9908e31780874a39bb125708bb155c605121ad71389884a0559aaeddfd0c2e90dab6dbfc478c0b7df35b41c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}