{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918529594",
    "entityType": "Track",
    "nonce": "0x28a031a4fd23a248d9b2c92edbcafc0eceed3332e18804a7ca90204baa4e2649",
    "signature": "0xea8f8144088a96572c9dc8f603ec386ecec9ab4ca3fe8392661aa1e1e565910739c776f22727dafc899de32d7982657df3d55db040ccb769b594ff6f436432721c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}