{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765610998",
    "entityType": "Track",
    "nonce": "0x1c9c7ed050348aaaedab57e89e2354713a5648e1f5dac31d19d687e52e9b9bda",
    "signature": "0x8bc1c37ce5fd10dcbc673524e5123b1c5e2c8bb966d6ef2ed2782530aa20d85d14f037609690ca2a658c9597a8eb33e304a721511828042a630d154a415f47761c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}