{
  "manageEntity": {
    "action": "Save",
    "entityId": "322717",
    "entityType": "Track",
    "nonce": "0xd1f1d409ecef00197a1e2b8a5fa73e08fac2f44b08909cae68d1767810a5dadd",
    "signature": "0x251f59db53660f078643227b3d82fb0804c3a4b5e4809baea668685a3b30eb4371bc0a425ce5dcf8931233ca9eaa2019ecc57f964e0d0a5474224fda58fa4ab11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}