{
  "manageEntity": {
    "action": "Save",
    "entityId": "676213",
    "entityType": "Track",
    "nonce": "0xfd055c45dee3eebbc47e6314ce3a8cca6692215ab1d9583a3f953b4707237172",
    "signature": "0xa30f10bf57ba259eddfc9434469f4f5fe0805eae78fb12466db67a16e45351b30a9c99606b3aac7404d7d17245445df5144ae59b3c0053b5503b63c7bf1fde051b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}