{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073974776",
    "entityType": "Track",
    "nonce": "0x5ddc8f98d122c1b431782e74823adb25a8c3eca163304aaf532db2d4dfb6f880",
    "signature": "0x1e010e1cd923135ea50275ca4b19c7cfebe4af982eb6fe17d7a150da273ab17c741427e8ddf3d1b79af97d65690c0b8662424de0db1944b3d123faec5a4b29021b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}