{
  "manageEntity": {
    "action": "Save",
    "entityId": "1676842999",
    "entityType": "Track",
    "nonce": "0xab7a7b132e19089cb871a54328dc6b46354c38f1ca2b9d90b9dc6667b65c4798",
    "signature": "0x0fe73ca70e7564fb3f0222766ea797e003acab2026695244a2aa0aa7001ca64370c60630ce9829091603a4a0e4d44549a8026128bb88dca735d6964da860aa291b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}