{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940387341",
    "entityType": "Track",
    "nonce": "0x7b737d98130b5a3552f2c14bc998a02faa666f7a5c6de055e41e3ee4e0f878e8",
    "signature": "0x16cf829fb83f712b855570bb44a28b857a90a0051094ac02538e1fc23ff0ea1415c5121d3b8058c7367c9e66d849707ec85038a05a29e0fc4490236f06595f321b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}