{
  "manageEntity": {
    "action": "Save",
    "entityId": "226515",
    "entityType": "Track",
    "nonce": "0x23b879edf3ecd7b4e1f24289a52be46c75655d87fd7eb018bbb256ded71c7c98",
    "signature": "0xa2ba53989f3c3b84caa5afd97d95a86fd9c08fb8aae35fce9cc29f95ffdb0a3d3aff7c82ddc9831a4687283cac371d55b72a6b68107f9d35b5d8adc0afdf4b521c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}