{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372694487",
    "entityType": "Track",
    "nonce": "0x24ade361592708d4a005556aabbb6f7d5deca94b931894a50833840e3fa4beb5",
    "signature": "0x9369bb03b3bc65f2261f62948e3b42005d3ff8bb5c5b5e655fbfcd9d4d64b3647e39990f0da2ab3dca478ff8e90da978def1b167550472501f1890470e78a6ab1b",
    "signer": "0x867F5a95ea271Bc535FC0d08C2Da2233280bfefB",
    "userId": "737613010"
  }
}