{
  "manageEntity": {
    "action": "Save",
    "entityId": "2026820689",
    "entityType": "Track",
    "nonce": "0xee8242ecb4bf04f701a37e4217aff8e60a7e0ba12e35d9b26aaad2f590275a4b",
    "signature": "0x0385707543627c43e60d4acb0e520c39c3af6b6219f265edf5fa4b6313d8ea384602c87b2e83dddb1a70bdb0e183bd94672e9c079b7e16a19760d05fe540dd931c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}