{
  "manageEntity": {
    "action": "Save",
    "entityId": "555014610",
    "entityType": "Track",
    "nonce": "0x8472d21c07b4525f8b56112b1e369e94dd8b76c036cbce3f2bc438285fa377e6",
    "signature": "0x02a7b0327af8562f64130b73be97328ded347eab546aea4e900e4d7074f319610ff4962a898ee2cae4d46b8806068711643a4b17f82de383afd924442564933c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}