{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263247959",
    "entityType": "Track",
    "nonce": "0xdad606aff6c26cb1d78ca27e6e3b9b65848c57c64ed7ff33d113431356a4bac1",
    "signature": "0x820e32b40851b1bb6c381b2e4e44d5a4b1585e2b483e2e5a758263ff3661f3085ec527a16e0be6eb8aa0000e2fa8b4b52c7a59efe252fc55f89f3699e23724381b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}