{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007771980",
    "entityType": "Track",
    "nonce": "0xf6a8057018688aec6bab149ae9fae6b5ffebe537a996c11070063997dd3a2ce1",
    "signature": "0x909b71b3e5b542b9a9a26c8394d5443155a464e362c5fcc4f34897f3382054cb54e6f805a565514a27653f18bb8d175a19f000d3cd717b8e214dfcbe76cfed701c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}