{
  "manageEntity": {
    "action": "Save",
    "entityId": "1443053143",
    "entityType": "Track",
    "nonce": "0x1e1db907e81acf4a5c30bef9fc39325a1cdc4be588106794e56abb06ca19c434",
    "signature": "0xc9e131f2f1f3abd45ffe3a5a80565d0a8975d3fa8741524a35b8d0f391e7a5b26c92368d76786e04ed300e4099214a988172bdc01c81c81a47b4c3e9db15447e1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}