{
  "manageEntity": {
    "action": "Save",
    "entityId": "1920232102",
    "entityType": "Track",
    "nonce": "0x9075ebd4c79214004064104fcce3d7c2ae879c963e5f2ed233d3ca070200eb83",
    "signature": "0xbf00885d3cef97f7feb62b4a103f949a6842f12e27d1525c65ecf47f7a48d3915bdad2c998bd882a2d7447825bef9235e742d5fdc0a84f7dadd989ca83122dca1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}