{
  "manageEntity": {
    "action": "Save",
    "entityId": "330202",
    "entityType": "Track",
    "nonce": "0x058f497d7814affe401549c8e2afb1397b0158c8e14961b4463a6cb363effa0c",
    "signature": "0xbbcfc5afb6a0d3ae764bf10e9f1b7cf6e5e45186b9e6c239a9741c26a39471b2401f10db05f1b62f3a5477c6049d8e751d34aa10d9aa130e9d7e8bf608e65fe41b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}