{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343849622",
    "entityType": "Track",
    "nonce": "0x72dcdcbe6c0fc363e4602862ea49bea2ab66c457c507e883abfc3036854a339d",
    "signature": "0xafa974c668b8e7ad5573493737d63203a2b181eb8cbad67d54f0a604fb66e08a582be980e7dc9cc3b518ddb6fcf5209a64bcbebe1ba12ea118553bf29bb69cdd1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}