{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401426017",
    "entityType": "Track",
    "nonce": "0x3e09beac375f755227741e245655d36dba02d31632c8f1c1b01a11ac6d637a6d",
    "signature": "0xac47446f7cf59b32f45de0b92b7d4e3300ea01d57af4890f645ac22ee4db7066402913903b41bf223d42908e556e172892880e487e14a0790f7c6bd170cb56611b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}