{
  "manageEntity": {
    "action": "Save",
    "entityId": "152311",
    "entityType": "Track",
    "nonce": "0x810ebebef69e7a69bd23b9eca03696d789ba7d2fdd98f092d520577f4bea7a1c",
    "signature": "0x4f81bde9158f89fb2f0754a192011fe76d033f9bb41598aa52ac7d427c35746d3e275adc5f12762a093e6af3398d7a8cfb1a5dfa17351ddf7b259e925ef0fa001b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}