{
  "manageEntity": {
    "action": "Save",
    "entityId": "984891490",
    "entityType": "Track",
    "nonce": "0x0f116ab0dcd4b31836f70b72ff0d651eccc4af38a9c8c0e23decf7e54637b76c",
    "signature": "0x9446c7c71ea60857faf5506f6e7a93819ef4aef898671d57d751122c86f1cf420257def28783b7e412f1aa85a2a9237ee3fbe96e7dd4ee6f3a8d3c038d66349d1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}