{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100535",
    "entityType": "Track",
    "nonce": "0x548ab12436c1191c0fc988dcba4385cf497158de4d27f45262a4c8324af1ae8c",
    "signature": "0x77692dd534739859bd61392518e1ef8f0825c0dcd1813649a1cef19c5454d41f6ff7ca185bd7582537a925692855f1a25c6e3e3556cb4aae7bc89b5f2cbd989f1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}