{
  "manageEntity": {
    "action": "Save",
    "entityId": "425627072",
    "entityType": "Track",
    "nonce": "0x69fc2ecab9eae9827ee3c7fd061fefd1b62d3ec32618d1f4c575bfb39c7d5ecc",
    "signature": "0x7301617d3c9f843f243577f8f1a9dc8d9929a3f256b4dc444d93bae32ac6b4df4c35e1503171850e72c54a1507d17ddc3434ef5a3c9d9952b4c321277578a8991c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}