{
  "manageEntity": {
    "action": "Save",
    "entityId": "1232115389",
    "entityType": "Track",
    "nonce": "0x2f7ddfb2d398f0145bfb1978648fb7c294cec087d1e75e219c643d3683b3c8cb",
    "signature": "0x7674eb41d4d5b8976325708cf6092ce462deaf8231c443c361b0a6b95adc5ce34f77c8f04c54204a5f90449d3b88faac77a2dbee2012fb540c02dab5e4effcf01c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}