{
  "manageEntity": {
    "action": "Save",
    "entityId": "240839229",
    "entityType": "Track",
    "nonce": "0x7d29c2cfdddca83858598cec8151b70cd4e8f1b337e406f27d9c86c8078c8ba5",
    "signature": "0xec513afadb944eeaa23702c15e5e4bcefe7f1a228025ddff55fc0f588d9e2b9710bf4888f405041d7e5734edddc4fe7fd3bc86c529720be87c0621b414f79d271b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}