{
  "manageEntity": {
    "action": "Save",
    "entityId": "752650583",
    "entityType": "Track",
    "nonce": "0x1a07e064c8e9712dcc0ffe8b3cecc8beb89518594831c28ebd0b69ce455f00cf",
    "signature": "0x96c5405d69d321328972f8496a8c48cf75e76d80968f432b60e29904175f5ebd78f906b39d82ae951911f647755e1d9c9215123b9bbc530f5e08637f1d8e3ca21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}