{
  "manageEntity": {
    "action": "Save",
    "entityId": "733545",
    "entityType": "Track",
    "nonce": "0x2b0be4506d18f24fdd523ee82b3e9b36bbf8d59bc5ceb522bed85894da8066f2",
    "signature": "0x44fac0a27b5d16e55b66408447da4bee2a11744632d6243a09c2102a8a4d03557b9122de4131e893efde7e66461e9b460d8cfb147a549f9d11827ddb16de01771b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}