{
  "manageEntity": {
    "action": "Save",
    "entityId": "1125191553",
    "entityType": "Track",
    "nonce": "0x52f74f0edaba68a6ef21b4e8af9bafc02844f842475e90411a48e701757339ff",
    "signature": "0x96ebc7314fa123cc1e408d843da5ff7d49f2a7e69c195969ff30264644cfefa873625bd22601431aa57d554f6f94efd8274caa0126b36cbcad7fbb711cf1b3c81b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}