{
  "manageEntity": {
    "action": "Save",
    "entityId": "1979056841",
    "entityType": "Track",
    "nonce": "0x7b46e3083b4fab84a2eb35230ef28dfedf04c37b014992a49cfbdbb161566455",
    "signature": "0x64a711ea33dacf6a593e43a97799468a76190d618774746ab459c57d00f9e49807ea251b21dfb25ad77230c3b20a5de6c2ddae18c1e862366774006f2291cd011c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}