{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844677456",
    "entityType": "Track",
    "nonce": "0x15d68a10090792542c3c180adc03568afe3d40f10a26d3a384378a477a95baf5",
    "signature": "0xd38409ee3ff89d6bd095863c90a1cd26bcace3607ebe9bd437f7b55feaa8f4257d138819b1dea9930d4b61948185cf905324c185c33df27cca9693a44f7937581b",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}