{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781356835",
    "entityType": "Track",
    "nonce": "1786087027118918831",
    "signature": "0x06ee24aa86a5cdf7c9635f5ca197f4afe779de9e5517a1eaa9c2466f0008493828c7861dca9fc5a9cd439d80055d12a0e2eef9895fd1a3c8e19af696ecfb63151c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}