{
  "manageEntity": {
    "action": "Save",
    "entityId": "194783",
    "entityType": "Track",
    "nonce": "0x0c0bb3b584a847db4b8c025a01c0ebb3793e9478e46267048840538f291c90e9",
    "signature": "0x894c6c7cd24933ca1681331800baeba30e97cb399ac99344909b615e9cbbe72e63b37a94f34cd1c0b44cb7e4c84798fb91784a221179f0a5015bb703a688be451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}