{
  "manageEntity": {
    "action": "Save",
    "entityId": "1450117518",
    "entityType": "Track",
    "nonce": "0x82e53769b96ff2a431c204f6e7808b73111d6578cca1d243202812507821a0b6",
    "signature": "0x89fd31e9141f94601ac99977222de030ec01db4bc6f853486953947102b289a12aa480bbbc9515d9765b4ff8a6daa9a929edb0aed868f36d271c08bc59e56c331c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}