{
  "manageEntity": {
    "action": "Save",
    "entityId": "1704339099",
    "entityType": "Track",
    "nonce": "0x19b6e8b26ecce9d37f7d7d4fcf54a72a5fa454e210ed602a9e3caa7a48b32ca7",
    "signature": "0xe96461d1c042ae3c9ad3496d8de72de6f805e5feac53b4c4edc0a43ca678097d47e8d517cfc2f82a22ddefaa06cfbfb47b84029059e5f45fc627dff255ac6cf31c",
    "signer": "0x5F2a7F099A16064bB150f4eF76B8B5A60DBf18dB",
    "userId": "321060201"
  }
}