{
  "manageEntity": {
    "action": "Save",
    "entityId": "287166",
    "entityType": "Track",
    "nonce": "0xcc8ee6bf16770d87df29604d688e883ec63a87f6f634692cd0cad64e19ce6859",
    "signature": "0x2c8667b4be7c7d028bb89b2ad54808b720dc7319f5b768fb2e9d0981ba9a71b43a5238cccecebfb99e56608e1d816b3c34000752c4514fe1fadeb844206a880c1b",
    "signer": "0x614BcEFdeA9FF4B3C32C2C1feF32af25602D1d43",
    "userId": "755335661"
  }
}