{
  "manageEntity": {
    "action": "Save",
    "entityId": "193334",
    "entityType": "Track",
    "nonce": "0xdfd51f56eecf51b395f7df9a26d751cca912281ce5121acac854f5e3456ca428",
    "signature": "0xc6b7b3534897742f713f852b8f0fe032f2fad1f10f1ef0720f8af16aa6008c097646a605edad5d54146fe8c2dcb07d8e449a4e2502acd9cef02e5f465083da5c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}