{
  "manageEntity": {
    "action": "Save",
    "entityId": "209793801",
    "entityType": "Track",
    "nonce": "0xfaeebc980174aa01005c1abb5ed073c2c10d15b854fc16335a82696cae52cc05",
    "signature": "0x4bd97b098aeb32e73e764ac29594f5f3e0e73a2473f7a9cd2189d20f57ca383d41634d2bd6341c068b5973a85db6b9391a4ab42ac104c6af1255ae28079cceff1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}