{
  "manageEntity": {
    "action": "Save",
    "entityId": "178307738",
    "entityType": "Track",
    "nonce": "0xadb81e40b9bf424539689997c4f67c3bf5b79fbd4cd1566e76ad28d4d3165437",
    "signature": "0xeef13b78ab61624f07ad9962c77bdce2ff01882fce7e1564dbad4ed16ac7cd1a54d1d389b08f8caffec797fd312500f19b49cb950e6ea9bee7d96d680c6ae3351b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}