{
  "manageEntity": {
    "action": "Save",
    "entityId": "1869648600",
    "entityType": "Track",
    "nonce": "0x4de35d96dda0d68b73e06ca68fa84f7866a60209e028d9ba7e59e9e127f07a02",
    "signature": "0xaae7aa28b5bcd277e4db38ec4a25ff9052da5ce28096a8112438e3bf03ca29647111591dc88805dac79162108065711edbcf820d01a96f767d11a131b54d77a21b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}