{
  "manageEntity": {
    "action": "Save",
    "entityId": "1299216894",
    "entityType": "Track",
    "nonce": "0xfcfc0c57eeb63176f8d62504433fb1e741eb8c13632df3c71386641c179169f3",
    "signature": "0xe3186afdce5813a6a7865dc1dfbbdbca2b409002459e7acb73469edcaab40fb11f27f4d27f2704cefcd6cf5bf64148bcade990e0af32de0525e21122eaaba2611c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}