{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591743766",
    "entityType": "Track",
    "nonce": "0xc4f036db8f0e0811faf0ccef7cbbbc351bc8f70e7113b53783c95c65ffb8ac28",
    "signature": "0x044688449017f0c724a5b948276d238b3b4083740ae62a77ec4b4fa0ab01a1e247761159d3d53c3ddb7a538351b06600ef9e473a5a817bbe49f978e21964966b1b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}