{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931736118",
    "entityType": "Track",
    "nonce": "0xef7c8f37091e3231f99db9413cd2e6980e04164d9eebe308fa900560d7caf1e4",
    "signature": "0x8f11d417db585aa214958b3317e35e96a8f334349ca3249b6b71a0ebc8ab9a66077755817beddbbb730426d154c7ddef75dd45ff9fe59cc32e0ad01cee8159a71c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}