{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322704319",
    "entityType": "Track",
    "nonce": "0x845c984aaa763937621d9adc4b153fb293a541919f54bc11d51b558e0d88b9da",
    "signature": "0x8564f8529864a3e260d4e40fd4891262262e50d77312011d88f0513014e380772d29c61f0fce48d3cb7f35945e62639187c5d534297de842fb276fc203fcba9f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}