{
  "manageEntity": {
    "action": "Save",
    "entityId": "1526218622",
    "entityType": "Track",
    "nonce": "0x18d390c53b0d31ca472e6f7d35a7260141ea8192aaf514c544a194eb05ca3382",
    "signature": "0x22b8cea7b7e9919ef73a1f30c406bcb5abc3ca5fa8cc61017f2b7b6f25dce1e63ec5966802b1641c521278c4857d00c714d92f74fa9002a617c14f282a87335f1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}