{
  "manageEntity": {
    "action": "Save",
    "entityId": "484696316",
    "entityType": "Track",
    "nonce": "0x8cb60676795b3eadd7998905f5b27e8e8e77e2e81ea1959b0a9b9846675f818c",
    "signature": "0xba22f60ba2f73a1be91a0339ea86b7842d7e9c359f61af4d20b250ae71fdf036473ce82029a2d2a447f6b915e3a0eae97fd799b58364d7c48d334068c9dd4af01b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}