{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250417680",
    "entityType": "Track",
    "nonce": "0x9667a8124d3f5bd20e67efc0aceda2f31f9f5f9c7a110294b0ab60aa8062999d",
    "signature": "0x930a1f1c4f2ac670a203cc6f35b79ef1b7360a0fea407596921927ee1d794bf945a9160736a2a106c72bf2b5bc528f338c2783dc3c7e538b060b3b4e431a93041b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}