{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396396743",
    "entityType": "Track",
    "nonce": "0x0b601652490304503b583b3bf6d934d2641ceaa2f1b318b5a37949db4462bdb4",
    "signature": "0xd1351dae3f36ef56db9c4d93c68d1bfb63495c704fcb9c6165eb49cb012174e4332263999a9b4674d23e21eaf83b7d258295c1a2cb77d6472374588bbb68e7d21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}