{
  "manageEntity": {
    "action": "Save",
    "entityId": "1083448032",
    "entityType": "Track",
    "nonce": "0xbc73247a20ea60e41871151a97ddb80ef7829482ea5c3985b7dc1036328bc32c",
    "signature": "0x86f29e25cdf355c4f5bc9b205cfb90dad10b7d90cb8e7946b75acdc1e13531fc31264d3a54158d5b947ccf31981a1f601bf7c5646b827ec84b91a86f0e33ac8e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}