{
  "manageEntity": {
    "action": "Save",
    "entityId": "691116398",
    "entityType": "Track",
    "nonce": "0x44beb254167e6737034d4725989ad114fa3a9fce4801017d697d6aed79b39e4a",
    "signature": "0x47acced66d4ceb6d44827f4330391e71838c7ecd45f9109c53f909ecac25276505006a7937dd8d0758c8ef06dfdde65ff24b90e2bdba48b93665b5bd0b4785091c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}