{
  "manageEntity": {
    "action": "Save",
    "entityId": "1000913452",
    "entityType": "Track",
    "nonce": "0x7aaffe22ca902b6a8638192ba12e8e5eba638793d82531005a1e6587de2ec3f2",
    "signature": "0xf6108aabec4eed96428f23b29e9e50a2e42f7c87fb093ea1ccdb4270bcb12ffc7e766a801df4e9a4ebf257f848e4d4b03d08bc4de60f1afb6e0bca2088dd17eb1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}