{
  "manageEntity": {
    "action": "Save",
    "entityId": "722067511",
    "entityType": "Track",
    "nonce": "0xcfea3a586da8c5bb62d9dfe4eb889131864f8788f1b86968cacf122fef666c7f",
    "signature": "0x76dc8e85fbaf9deb86846c313aef2d86da863aaac96a93a0b6ec6932d40b5b2245fa806d447a24d96dc4b8c975461a51576ab20acf8a2f462623875cf7035e471b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}