{
  "manageEntity": {
    "action": "Save",
    "entityId": "751669442",
    "entityType": "Track",
    "nonce": "0xbc6a6e6e3fdff8abb13cffc6b01af962a826281796239068d220f69b32c3d78d",
    "signature": "0xc35d143b1e7791fc0dc924a7b92d9448413d5164f9bb9313a90bf110defdadab23a5a954274c153f3aa5d8648cefb4f9971f8bc5b3e85de9eaece414730077ba1b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}