{
  "manageEntity": {
    "action": "Save",
    "entityId": "2013870053",
    "entityType": "Track",
    "nonce": "0xb62b96a9514e21c5f21000f6fa302c2e2b453247516a46b197ac5ad7e4ce068e",
    "signature": "0xcad94601e66825345ff6983e55f04a35a817ba2f97d870692e4e508339e36110577ccac1560c370c438b131d348aeeed5a252f42898909500428cb0813ffeb591b",
    "signer": "0x4921e42cC5B75DC8a77d26eC8a762a282A16707E",
    "userId": "841756759"
  }
}