{
  "manageEntity": {
    "action": "Save",
    "entityId": "877464806",
    "entityType": "Track",
    "nonce": "0x1bfbe89967d5e5058fcac0d21b2dc55d2104a8ce6da83f335be1eb5d1a3c2394",
    "signature": "0xe460f5050f3a734ce9441247fcd4ef6d1ddbf210ee6e7302a40adb76cf499ff768c071610078192e390e372a298ac4eff4b5a07d22429d9e8514f40a90ba98d71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}